diff --git a/rootfs.py b/rootfs.py
index 1321c34..193dadf 100755
--- a/rootfs.py
+++ b/rootfs.py
@@ -29,10 +29,11 @@ def create_configuration_file(args):
     """
     config_path = os.path.join('sysa', 'bootstrap.cfg')
     with open(config_path, "w", encoding="utf_8") as config:
-        config.write("FORCE_TIMESTAMPS=" + str(args.force_timestamps) + "\n")
-        config.write("CHROOT=" + str(args.chroot or args.bwrap) + "\n")
-        config.write("CHROOT_ONLY_SYSA=" + str(args.bwrap) + "\n")
-        config.write("UPDATE_CHECKSUMS=" + str(args.update_checksums) + "\n")
+        config.write(f"FORCE_TIMESTAMPS={args.force_timestamps}\n")
+        config.write(f"CHROOT={args.chroot or args.bwrap}\n")
+        config.write(f"CHROOT_ONLY_SYSA={args.bwrap}\n")
+        config.write(f"UPDATE_CHECKSUMS={args.update_checksums}\n")
+        config.write(f"JOBS={args.cores}\n")
         config.write("DISK=sda1\n")
         if (args.bare_metal or args.qemu) and not args.kernel:
             config.write("KERNEL_BOOTSTRAP=True\n")
@@ -61,6 +62,8 @@ def main():
                         action="store_true")
     parser.add_argument("--tmpfs-size", help="Size of the tmpfs",
                         default="8G")
+    parser.add_argument("--cores", help="Cores to use for building",
+                         default=2)
     parser.add_argument("--force-timestamps",
                         help="Force all files timestamps to be 0 unix time",
                         action="store_true")
@@ -119,6 +122,10 @@ def main():
     if args.bwrap and args.tmpfs:
         raise ValueError("tmpfs cannot be used with bwrap.")
 
+    # Cores validation
+    if int(args.cores) < 1:
+        raise ValueError("Must use one or more cores.")
+
     # bootstrap.cfg
     if args.bare_metal:
         args.no_create_config = True
@@ -221,6 +228,7 @@ print(shutil.which('chroot'))
             run(args.qemu_cmd,
                 '-enable-kvm',
                 '-m', str(args.qemu_ram) + 'M',
+                '-smp', str(args.cores),
                 '-no-reboot',
                 '-hda', tmpdir.get_disk("sysc"),
                 '-nic', 'user,ipv6=off,model=e1000',
@@ -233,6 +241,7 @@ print(shutil.which('chroot'))
             run(args.qemu_cmd,
                 '-enable-kvm',
                 '-m', "4G",
+                '-smp', str(args.cores),
                 '-no-reboot',
                 '-drive', 'file=' + os.path.join(system_a.tmp_dir, 'sysa.img') + ',format=raw',
                 '-machine', 'kernel-irqchip=split',
diff --git a/sysa/autoconf-2.53/autoconf-2.53.sh b/sysa/autoconf-2.53/autoconf-2.53.sh
index 6bef136..b041584 100755
--- a/sysa/autoconf-2.53/autoconf-2.53.sh
+++ b/sysa/autoconf-2.53/autoconf-2.53.sh
@@ -31,7 +31,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true DESTDIR="${DESTDIR}"
+    make "${MAKEJOBS}" MAKEINFO=true DESTDIR="${DESTDIR}"
 }
 
 src_install() {
diff --git a/sysa/autoconf-2.54/autoconf-2.54.sh b/sysa/autoconf-2.54/autoconf-2.54.sh
index bd30c54..aa1a82c 100755
--- a/sysa/autoconf-2.54/autoconf-2.54.sh
+++ b/sysa/autoconf-2.54/autoconf-2.54.sh
@@ -33,7 +33,7 @@ src_compile() {
     # Workaround for racy make dependencies
     make -C bin autom4te
     make -C lib
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/autoconf-2.55/autoconf-2.55.sh b/sysa/autoconf-2.55/autoconf-2.55.sh
index 55ad140..b74e4d1 100755
--- a/sysa/autoconf-2.55/autoconf-2.55.sh
+++ b/sysa/autoconf-2.55/autoconf-2.55.sh
@@ -27,7 +27,7 @@ src_compile() {
     make -C bin autom4te
     make -C lib
 
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/autoconf-2.57/autoconf-2.57.sh b/sysa/autoconf-2.57/autoconf-2.57.sh
index 877a7c6..2bc710f 100755
--- a/sysa/autoconf-2.57/autoconf-2.57.sh
+++ b/sysa/autoconf-2.57/autoconf-2.57.sh
@@ -25,7 +25,7 @@ src_compile() {
     # Workaround for racy make dependencies
     make -C bin autom4te
     make -C lib
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/autoconf-2.59/autoconf-2.59.sh b/sysa/autoconf-2.59/autoconf-2.59.sh
index bfff32d..e880dec 100755
--- a/sysa/autoconf-2.59/autoconf-2.59.sh
+++ b/sysa/autoconf-2.59/autoconf-2.59.sh
@@ -25,7 +25,7 @@ src_compile() {
     # Workaround for racy make dependencies
     make -C bin autom4te
     make -C lib
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/autoconf-2.61/autoconf-2.61.sh b/sysa/autoconf-2.61/autoconf-2.61.sh
index 10e32ea..b804272 100755
--- a/sysa/autoconf-2.61/autoconf-2.61.sh
+++ b/sysa/autoconf-2.61/autoconf-2.61.sh
@@ -19,7 +19,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make -j1 MAKEINFO=true PREFIX="${PREFIX}"
 }
 
 src_install() {
diff --git a/sysa/autoconf-2.64/autoconf-2.64.sh b/sysa/autoconf-2.64/autoconf-2.64.sh
index 0ef02ba..60ef2af 100755
--- a/sysa/autoconf-2.64/autoconf-2.64.sh
+++ b/sysa/autoconf-2.64/autoconf-2.64.sh
@@ -18,7 +18,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/autoconf-2.69/autoconf-2.69.sh b/sysa/autoconf-2.69/autoconf-2.69.sh
index 2cafa88..6f37110 100755
--- a/sysa/autoconf-2.69/autoconf-2.69.sh
+++ b/sysa/autoconf-2.69/autoconf-2.69.sh
@@ -18,7 +18,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/automake-1.10.3/automake-1.10.3.sh b/sysa/automake-1.10.3/automake-1.10.3.sh
index a32f5aa..283c84a 100755
--- a/sysa/automake-1.10.3/automake-1.10.3.sh
+++ b/sysa/automake-1.10.3/automake-1.10.3.sh
@@ -19,7 +19,7 @@ src_configure() {
 }
 
 src_compile() {
-    AUTOM4TE=autom4te-2.61 make MAKEINFO=true CC=tcc
+    AUTOM4TE=autom4te-2.61 make "${MAKEJOBS}" MAKEINFO=true CC=tcc
 }
 
 src_install() {
diff --git a/sysa/automake-1.11.2/automake-1.11.2.sh b/sysa/automake-1.11.2/automake-1.11.2.sh
index 4f6302a..d163c85 100755
--- a/sysa/automake-1.11.2/automake-1.11.2.sh
+++ b/sysa/automake-1.11.2/automake-1.11.2.sh
@@ -20,7 +20,7 @@ src_configure() {
 }
 
 src_compile() {
-    AUTORECONF=autoreconf-2.64 AUTOM4TE=autom4te-2.64 AUTOHEADER=autoheader-2.64 AUTOCONF=autoconf-2.64 make MAKEINFO=true
+    AUTORECONF=autoreconf-2.64 AUTOM4TE=autom4te-2.64 AUTOHEADER=autoheader-2.64 AUTOCONF=autoconf-2.64 make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/automake-1.15.1/automake-1.15.1.sh b/sysa/automake-1.15.1/automake-1.15.1.sh
index 9195980..41c8b84 100755
--- a/sysa/automake-1.15.1/automake-1.15.1.sh
+++ b/sysa/automake-1.15.1/automake-1.15.1.sh
@@ -22,7 +22,7 @@ src_configure() {
 }
 
 src_compile() {
-    AUTORECONF=autoreconf-2.69 AUTOM4TE=autom4te-2.69 AUTOHEADER=autoheader-2.69 AUTOCONF=autoconf-2.69 make MAKEINFO=true
+    AUTORECONF=autoreconf-2.69 AUTOM4TE=autom4te-2.69 AUTOHEADER=autoheader-2.69 AUTOCONF=autoconf-2.69 make -j1 MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/automake-1.7.8/automake-1.7.8.sh b/sysa/automake-1.7.8/automake-1.7.8.sh
index da1ee38..e6bc3e0 100755
--- a/sysa/automake-1.7.8/automake-1.7.8.sh
+++ b/sysa/automake-1.7.8/automake-1.7.8.sh
@@ -13,7 +13,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/automake-1.7/automake-1.7.sh b/sysa/automake-1.7/automake-1.7.sh
index d5e6c1f..a8c2fd3 100755
--- a/sysa/automake-1.7/automake-1.7.sh
+++ b/sysa/automake-1.7/automake-1.7.sh
@@ -15,7 +15,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/automake-1.8.5/automake-1.8.5.sh b/sysa/automake-1.8.5/automake-1.8.5.sh
index fcecab9..253b194 100755
--- a/sysa/automake-1.8.5/automake-1.8.5.sh
+++ b/sysa/automake-1.8.5/automake-1.8.5.sh
@@ -13,7 +13,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/automake-1.9.6/automake-1.9.6.sh b/sysa/automake-1.9.6/automake-1.9.6.sh
index de4e538..b39893c 100755
--- a/sysa/automake-1.9.6/automake-1.9.6.sh
+++ b/sysa/automake-1.9.6/automake-1.9.6.sh
@@ -14,7 +14,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/bash-2.05b/bash-2.05b.sh b/sysa/bash-2.05b/bash-2.05b.sh
index c6efb71..7104b41 100755
--- a/sysa/bash-2.05b/bash-2.05b.sh
+++ b/sysa/bash-2.05b/bash-2.05b.sh
@@ -39,6 +39,10 @@ src_configure() {
         bash_cv_dev_fd=whacky
 }
 
+src_compile() {
+    make -j1
+}
+
 src_install() {
     install -D bash "${DESTDIR}${PREFIX}/bin/bash"
     # Work around weird symlink bug
diff --git a/sysa/bc-1.07.1/bc-1.07.1.sh b/sysa/bc-1.07.1/bc-1.07.1.sh
index b881d2d..c4f6e9b 100755
--- a/sysa/bc-1.07.1/bc-1.07.1.sh
+++ b/sysa/bc-1.07.1/bc-1.07.1.sh
@@ -18,4 +18,3 @@ src_configure() {
     ./configure --prefix="${PREFIX}" \
         --build=i386-unknown-linux-musl
 }
-
diff --git a/sysa/binutils-2.30/binutils-2.30.sh b/sysa/binutils-2.30/binutils-2.30.sh
index bdffe65..ef794a9 100755
--- a/sysa/binutils-2.30/binutils-2.30.sh
+++ b/sysa/binutils-2.30/binutils-2.30.sh
@@ -88,7 +88,7 @@ src_configure() {
 src_compile() {
     make -C bfd headers
     for dir in libiberty zlib bfd opcodes binutils gas gprof ld; do
-        make -C $dir tooldir=${PREFIX} CPPFLAGS="-DPLUGIN_LITTLE_ENDIAN" MAKEINFO=true
+        make "${MAKEJOBS}" -C $dir tooldir=${PREFIX} CPPFLAGS="-DPLUGIN_LITTLE_ENDIAN" MAKEINFO=true
     done
 }
 
diff --git a/sysa/bison-3.4.1/stage1.sh b/sysa/bison-3.4.1/stage1.sh
index c6b04e8..8eac871 100755
--- a/sysa/bison-3.4.1/stage1.sh
+++ b/sysa/bison-3.4.1/stage1.sh
@@ -19,3 +19,7 @@ src_prepare() {
     cp ../../mk/lib.mk lib/Makefile
     cp ../../mk/src.mk src/Makefile
 }
+
+src_compile() {
+    make -j1 -f Makefile PREFIX="${PREFIX}"
+}
diff --git a/sysa/bison-3.4.1/stage2.sh b/sysa/bison-3.4.1/stage2.sh
index 9ae813d..517422b 100755
--- a/sysa/bison-3.4.1/stage2.sh
+++ b/sysa/bison-3.4.1/stage2.sh
@@ -19,3 +19,7 @@ src_prepare() {
     cp ../../mk/lib.mk lib/Makefile
     cp ../../mk/src.mk src/Makefile
 }
+
+src_compile() {
+    make -j1 -f Makefile PREFIX="${PREFIX}"
+}
diff --git a/sysa/bison-3.4.1/stage3.sh b/sysa/bison-3.4.1/stage3.sh
index 22373a6..e863adf 100755
--- a/sysa/bison-3.4.1/stage3.sh
+++ b/sysa/bison-3.4.1/stage3.sh
@@ -16,3 +16,7 @@ src_prepare() {
     cp ../../mk/lib.mk lib/Makefile
     cp ../../mk/src.mk src/Makefile
 }
+
+src_compile() {
+    make -j1 -f Makefile PREFIX="${PREFIX}"
+}
diff --git a/sysa/bzip2-1.0.8/bzip2-1.0.8.sh b/sysa/bzip2-1.0.8/bzip2-1.0.8.sh
index dc08fab..fbda6c3 100755
--- a/sysa/bzip2-1.0.8/bzip2-1.0.8.sh
+++ b/sysa/bzip2-1.0.8/bzip2-1.0.8.sh
@@ -9,7 +9,7 @@ src_prepare() {
 }
 
 src_compile() {
-   make CC=tcc AR="tcc -ar" bzip2
+   make "${MAKEJOBS}" CC=tcc AR="tcc -ar" bzip2
 }
 
 src_install() {
diff --git a/sysa/findutils-4.2.33/findutils-4.2.33.sh b/sysa/findutils-4.2.33/findutils-4.2.33.sh
index 477624b..7669d94 100755
--- a/sysa/findutils-4.2.33/findutils-4.2.33.sh
+++ b/sysa/findutils-4.2.33/findutils-4.2.33.sh
@@ -25,7 +25,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true DESTDIR="${DESTDIR}"
+    make "${MAKEJOBS}" MAKEINFO=true DESTDIR="${DESTDIR}"
 }
 
 src_install() {
diff --git a/sysa/flex-2.5.11/flex-2.5.11.sh b/sysa/flex-2.5.11/flex-2.5.11.sh
index 9e060cb..70b0159 100755
--- a/sysa/flex-2.5.11/flex-2.5.11.sh
+++ b/sysa/flex-2.5.11/flex-2.5.11.sh
@@ -11,6 +11,10 @@ src_prepare() {
     rm parse.c parse.h scan.c skel.c
 }
 
+src_compile() {
+    make -j1 PREFIX="${PREFIX}"
+}
+
 src_install() {
     if test -d /lex; then
         # Remove lex, later make install will symlink lex to flex
diff --git a/sysa/flex-2.6.4/flex-2.6.4.sh b/sysa/flex-2.6.4/flex-2.6.4.sh
index 022b84e..6fa9def 100755
--- a/sysa/flex-2.6.4/flex-2.6.4.sh
+++ b/sysa/flex-2.6.4/flex-2.6.4.sh
@@ -12,7 +12,7 @@ src_prepare() {
 
 src_compile() {
     cd src
-    default
+    make -j1 PREFIX="${PREFIX}"
     cd ..
 }
 
diff --git a/sysa/gcc-4.0.4/pass1.sh b/sysa/gcc-4.0.4/pass1.sh
index c20fe73..acae7d1 100755
--- a/sysa/gcc-4.0.4/pass1.sh
+++ b/sysa/gcc-4.0.4/pass1.sh
@@ -93,7 +93,7 @@ src_compile() {
     mkdir build/gcc/include
     ln -s ../../../gcc/gsyslimits.h build/gcc/include/syslimits.h
     for dir in libiberty libcpp gcc; do
-        make -C build/$dir LIBGCC2_INCLUDES=-I"${PREFIX}/include" STMP_FIXINC=
+        make "${MAKEJOBS}" -C build/$dir LIBGCC2_INCLUDES=-I"${PREFIX}/include" STMP_FIXINC=
     done
 }
 
diff --git a/sysa/gcc-4.0.4/pass2.sh b/sysa/gcc-4.0.4/pass2.sh
index 49d3e78..bcae547 100755
--- a/sysa/gcc-4.0.4/pass2.sh
+++ b/sysa/gcc-4.0.4/pass2.sh
@@ -87,7 +87,7 @@ src_configure() {
 src_compile() {
     ln -s . build/build-i386-unknown-linux-musl
     for dir in libiberty libcpp gcc; do
-        make -C build/$dir LIBGCC2_INCLUDES=-I"${PREFIX}/include" STMP_FIXINC=
+        make "${MAKEJOBS}" -C build/$dir LIBGCC2_INCLUDES=-I"${PREFIX}/include" STMP_FIXINC=
     done
 }
 
diff --git a/sysa/help2man-1.36.4/help2man-1.36.4.sh b/sysa/help2man-1.36.4/help2man-1.36.4.sh
index 96fa801..737c19b 100755
--- a/sysa/help2man-1.36.4/help2man-1.36.4.sh
+++ b/sysa/help2man-1.36.4/help2man-1.36.4.sh
@@ -18,7 +18,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/helpers.sh b/sysa/helpers.sh
index 7b9f1ea..ef5fde8 100755
--- a/sysa/helpers.sh
+++ b/sysa/helpers.sh
@@ -321,7 +321,7 @@ default_src_configure() {
 
 # Default function for compiling source. It simply runs make without any parameters.
 default_src_compile() {
-    make -f Makefile PREFIX="${PREFIX}"
+    make "${MAKEJOBS}" -f Makefile PREFIX="${PREFIX}"
 }
 
 # Default installing function. PREFIX should be set by run.sh script.
diff --git a/sysa/kbd-1.15/kbd-1.15.sh b/sysa/kbd-1.15/kbd-1.15.sh
index 39e5287..98e1458 100755
--- a/sysa/kbd-1.15/kbd-1.15.sh
+++ b/sysa/kbd-1.15/kbd-1.15.sh
@@ -22,7 +22,7 @@ src_configure() {
 src_compile() {
     # Missing dependency in Makefile
     flex -o src/analyze.c src/analyze.l
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/libtool-2.2.4/libtool-2.2.4.sh b/sysa/libtool-2.2.4/libtool-2.2.4.sh
index d1bcf63..3abb60d 100755
--- a/sysa/libtool-2.2.4/libtool-2.2.4.sh
+++ b/sysa/libtool-2.2.4/libtool-2.2.4.sh
@@ -29,7 +29,7 @@ src_configure() {
 }
 
 src_compile() {
-    make AUTOM4TE=autom4te-2.61 MAKEINFO=true
+    make "${MAKEJOBS}" AUTOM4TE=autom4te-2.61 MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysa/linux-4.9.10/linux-4.9.10.sh b/sysa/linux-4.9.10/linux-4.9.10.sh
index 09e72d9..4d0cf62 100644
--- a/sysa/linux-4.9.10/linux-4.9.10.sh
+++ b/sysa/linux-4.9.10/linux-4.9.10.sh
@@ -50,8 +50,8 @@ src_compile() {
     generate_autoconf_h
 
     # Allow use of patched initramfs_list.sh (which is required anyway)
-    make ARCH=i386 prepare
-    PATH="${PWD}/usr:${PATH}" make ARCH=i386
+    make "${MAKEJOBS}" ARCH=i386 prepare
+    PATH="${PWD}/usr:${PATH}" make "${MAKEJOBS}" ARCH=i386
 
     # Clear up more space
     find . -name '*.o' -delete
diff --git a/sysa/make-3.82/make-3.82.sh b/sysa/make-3.82/make-3.82.sh
index d9792b6..3cb057c 100755
--- a/sysa/make-3.82/make-3.82.sh
+++ b/sysa/make-3.82/make-3.82.sh
@@ -20,7 +20,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO="true"
+    make "${MAKEJOBS}" MAKEINFO="true"
 }
 
 src_install() {
diff --git a/sysa/musl-1.1.24/binutils-rebuild.sh b/sysa/musl-1.1.24/binutils-rebuild.sh
index b0700bf..9058cc5 100755
--- a/sysa/musl-1.1.24/binutils-rebuild.sh
+++ b/sysa/musl-1.1.24/binutils-rebuild.sh
@@ -24,7 +24,7 @@ src_configure() {
 }
 
 src_compile() {
-    make PREFIX="${PREFIX}" CROSS_COMPILE= CFLAGS="-DSYSCALL_NO_TLS" AS_CMD='as -o $@ $<'
+    make "${MAKEJOBS}" PREFIX="${PREFIX}" CROSS_COMPILE= CFLAGS="-DSYSCALL_NO_TLS" AS_CMD='as -o $@ $<'
 }
 
 src_install() {
diff --git a/sysa/musl-1.1.24/musl-1.1.24.sh b/sysa/musl-1.1.24/musl-1.1.24.sh
index be498d0..342b8a4 100755
--- a/sysa/musl-1.1.24/musl-1.1.24.sh
+++ b/sysa/musl-1.1.24/musl-1.1.24.sh
@@ -27,5 +27,5 @@ src_configure() {
 }
 
 src_compile() {
-    make CROSS_COMPILE= AR="tcc -ar" RANLIB=true CFLAGS="-DSYSCALL_NO_TLS"
+    make "${MAKEJOBS}" CROSS_COMPILE= AR="tcc -ar" RANLIB=true CFLAGS="-DSYSCALL_NO_TLS"
 }
diff --git a/sysa/musl-1.2.3/musl-1.2.3.sh b/sysa/musl-1.2.3/musl-1.2.3.sh
index 0640cf0..d6de474 100755
--- a/sysa/musl-1.2.3/musl-1.2.3.sh
+++ b/sysa/musl-1.2.3/musl-1.2.3.sh
@@ -29,5 +29,5 @@ src_configure() {
 }
 
 src_compile() {
-    make CROSS_COMPILE=
+    make "${MAKEJOBS}" CROSS_COMPILE=
 }
diff --git a/sysa/perl-5.6.2/perl-5.6.2.sh b/sysa/perl-5.6.2/perl-5.6.2.sh
index 72c3df9..2e29ff5 100755
--- a/sysa/perl-5.6.2/perl-5.6.2.sh
+++ b/sysa/perl-5.6.2/perl-5.6.2.sh
@@ -34,6 +34,10 @@ src_prepare() {
     sed -i "s#/usr/include/errno.h#${PREFIX}/include/musl/bits/errno.h#" ext/Errno/Errno_pm.PL
 }
 
+src_compile() {
+    make -j1 PREFIX="${PREFIX}"
+}
+
 src_install() {
     # Remove old perl
     rm -rf "${PREFIX}"/lib/perl5/
diff --git a/sysa/run.sh b/sysa/run.sh
index 4fa17fd..e177d05 100755
--- a/sysa/run.sh
+++ b/sysa/run.sh
@@ -21,6 +21,13 @@ SRCDIR="${srcdir}"
 # shellcheck source=sysa/helpers.sh
 . helpers.sh
 
+if [ "${KERNEL_BOOTSTRAP}" ]; then
+    # Fiwix does not support SMP
+    MAKEJOBS="-j1"
+else
+    MAKEJOBS="-j${JOBS}"
+fi
+
 # Ask some questions
 echo
 echo "Now that bash has been built, there are potentially some questions for you!"
@@ -178,6 +185,7 @@ SOURCES=${SOURCES}
 DESTDIR=${DESTDIR}
 DISTFILES=${DISTFILES}
 SRCDIR=${SRCDIR}
+MAKEJOBS=${MAKEJOBS}
 EOF
 
 exec env -i bash run2.sh
diff --git a/sysa/sed-4.0.9/sed-4.0.9.sh b/sysa/sed-4.0.9/sed-4.0.9.sh
index 1b8b85d..47a8350 100755
--- a/sysa/sed-4.0.9/sed-4.0.9.sh
+++ b/sysa/sed-4.0.9/sed-4.0.9.sh
@@ -8,6 +8,10 @@ src_prepare() {
     touch config.h
 }
 
+src_compile() {
+    make -j1 PREFIX="${PREFIX}"
+}
+
 src_install() {
     default
 }
diff --git a/sysc/autoconf-2.71/autoconf-2.71.sh b/sysc/autoconf-2.71/autoconf-2.71.sh
index f43ac73..5178eef 100755
--- a/sysc/autoconf-2.71/autoconf-2.71.sh
+++ b/sysc/autoconf-2.71/autoconf-2.71.sh
@@ -15,7 +15,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/autoconf-archive-2021.02.19/autoconf-archive-2021.02.19.sh b/sysc/autoconf-archive-2021.02.19/autoconf-archive-2021.02.19.sh
index e68cf4e..db97079 100755
--- a/sysc/autoconf-archive-2021.02.19/autoconf-archive-2021.02.19.sh
+++ b/sysc/autoconf-archive-2021.02.19/autoconf-archive-2021.02.19.sh
@@ -11,7 +11,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true DESTDIR="${DESTDIR}"
+    make "${MAKEJOBS}" MAKEINFO=true DESTDIR="${DESTDIR}"
 }
 
 src_install() {
diff --git a/sysc/autogen-5.18.16/autogen-5.18.16.sh b/sysc/autogen-5.18.16/autogen-5.18.16.sh
index 5be98f0..ec4ca81 100755
--- a/sysc/autogen-5.18.16/autogen-5.18.16.sh
+++ b/sysc/autogen-5.18.16/autogen-5.18.16.sh
@@ -47,7 +47,7 @@ src_compile() {
 	--disable-shared \
 	--enable-timeout=15
     touch doc/agdoc.texi # build later
-    make CFLAGS=-Wno-error
+    make -j1 CFLAGS=-Wno-error
 
     # Fix non-reproducible man-page
     awk '{gsub("\\(/tmp/.*", "", $7); print}' agen5/autogen.1 > autogen.1
diff --git a/sysc/automake-1.16.3/automake-1.16.3.sh b/sysc/automake-1.16.3/automake-1.16.3.sh
index 1d42116..b535f11 100755
--- a/sysc/automake-1.16.3/automake-1.16.3.sh
+++ b/sysc/automake-1.16.3/automake-1.16.3.sh
@@ -15,7 +15,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/bash-5.2.15/bash-5.2.15.sh b/sysc/bash-5.2.15/bash-5.2.15.sh
index a6e6749..d8e69ef 100755
--- a/sysc/bash-5.2.15/bash-5.2.15.sh
+++ b/sysc/bash-5.2.15/bash-5.2.15.sh
@@ -47,6 +47,10 @@ src_configure() {
         bash_cv_dev_fd=whacky
 }
 
+src_compile() {
+    make -j1 PREFIX="${PREFIX}"
+}
+
 src_install() {
     install -D bash "${DESTDIR}${PREFIX}/bin/bash"
     # Work around weird symlink bug
diff --git a/sysc/binutils-2.38/binutils-2.38.sh b/sysc/binutils-2.38/binutils-2.38.sh
index 5c4eef0..cb07d5f 100755
--- a/sysc/binutils-2.38/binutils-2.38.sh
+++ b/sysc/binutils-2.38/binutils-2.38.sh
@@ -89,7 +89,7 @@ src_configure() {
 src_compile() {
     make -C bfd headers
     for dir in libiberty bfd opcodes libctf binutils gas gprof ld; do
-        make -C $dir tooldir=${PREFIX} CFLAGS="-std=c99"
+        make "${MAKEJOBS}" -C $dir tooldir=${PREFIX} CFLAGS="-std=c99"
     done
 }
 
diff --git a/sysc/bison-2.3/bison-2.3.sh b/sysc/bison-2.3/bison-2.3.sh
index 98e76fe..bec31dd 100755
--- a/sysc/bison-2.3/bison-2.3.sh
+++ b/sysc/bison-2.3/bison-2.3.sh
@@ -26,7 +26,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make -j1 MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/bison-3.4.2/bison-3.4.2.sh b/sysc/bison-3.4.2/bison-3.4.2.sh
index 8a598a4..12dfcc8 100755
--- a/sysc/bison-3.4.2/bison-3.4.2.sh
+++ b/sysc/bison-3.4.2/bison-3.4.2.sh
@@ -27,7 +27,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make -j1 MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/coreutils-8.32/coreutils-8.32.sh b/sysc/coreutils-8.32/coreutils-8.32.sh
index c55813e..6bf5216 100755
--- a/sysc/coreutils-8.32/coreutils-8.32.sh
+++ b/sysc/coreutils-8.32/coreutils-8.32.sh
@@ -42,7 +42,7 @@ src_configure() {
 }
 
 src_compile() {
-    make PREFIX="${PREFIX}" MAKEINFO="true"
+    make "${MAKEJOBS}" PREFIX="${PREFIX}" MAKEINFO="true"
 }
 
 src_install() {
diff --git a/sysc/flex-2.5.33/flex-2.5.33.sh b/sysc/flex-2.5.33/flex-2.5.33.sh
index c1dd0ef..a3e1881 100755
--- a/sysc/flex-2.5.33/flex-2.5.33.sh
+++ b/sysc/flex-2.5.33/flex-2.5.33.sh
@@ -22,7 +22,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/gc-8.0.4/gc-8.0.4.sh b/sysc/gc-8.0.4/gc-8.0.4.sh
index 3a5c922..8eedb67 100755
--- a/sysc/gc-8.0.4/gc-8.0.4.sh
+++ b/sysc/gc-8.0.4/gc-8.0.4.sh
@@ -11,6 +11,6 @@ src_configure() {
     ./configure \
         --prefix="${PREFIX}" \
         --libdir="${LIBDIR}" \
-	--disable-shared \
+        --disable-shared \
         CFLAGS='-D_GNU_SOURCE -DNO_GETCONTEXT -DSEARCH_FOR_DATA_START -DUSE_MMAP -DHAVE_DL_ITERATE_PHDR'
 }
diff --git a/sysc/gcc-4.7.4/gcc-4.7.4.sh b/sysc/gcc-4.7.4/gcc-4.7.4.sh
index e92fab6..21027ec 100755
--- a/sysc/gcc-4.7.4/gcc-4.7.4.sh
+++ b/sysc/gcc-4.7.4/gcc-4.7.4.sh
@@ -125,15 +125,15 @@ src_compile() {
     ln -s . build/build-i386-unknown-linux-musl
     for dir in libiberty libcpp libdecnumber gcc; do
         # We have makeinfo now but it is not happy with gcc .info files, so skip it
-        make -C build/$dir LIBGCC2_INCLUDES=-I"${PREFIX}/include" \
+        make "${MAKEJOBS}" -C build/$dir LIBGCC2_INCLUDES=-I"${PREFIX}/include" \
             STMP_FIXINC= GMPLIBS="-lmpc -lmpfr -lgmp" MAKEINFO=true
     done
 
     # host_subdir is necessary because we have slightly different build directory layout
-    make -C build/libgcc PATH="${PATH}:../gcc" CC=../gcc/xgcc \
+    make "${MAKEJOBS}" -C build/libgcc PATH="${PATH}:../gcc" CC=../gcc/xgcc \
         host_subdir=build CFLAGS="-I../gcc/include -I/${PREFIX}/include"
 
-    make -C build/libstdc++-v3 PATH="${PATH}:${PWD}/build/gcc" \
+    make "${MAKEJOBS}" -C build/libstdc++-v3 PATH="${PATH}:${PWD}/build/gcc" \
         CXXFLAGS="-I${PWD}/build/gcc/include -I ${PREFIX}/include"
 }
 
diff --git a/sysc/gettext-0.21/gettext-0.21.sh b/sysc/gettext-0.21/gettext-0.21.sh
index 000bc76..6177a94 100755
--- a/sysc/gettext-0.21/gettext-0.21.sh
+++ b/sysc/gettext-0.21/gettext-0.21.sh
@@ -21,7 +21,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true CFLAGS="-I${PWD}/libtextstyle/lib"
+    make "${MAKEJOBS}" MAKEINFO=true CFLAGS="-I${PWD}/libtextstyle/lib"
 }
 
 src_install() {
diff --git a/sysc/gmp-6.2.1/gmp-6.2.1.sh b/sysc/gmp-6.2.1/gmp-6.2.1.sh
index 83b9a06..7ce9102 100755
--- a/sysc/gmp-6.2.1/gmp-6.2.1.sh
+++ b/sysc/gmp-6.2.1/gmp-6.2.1.sh
@@ -23,7 +23,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true DESTDIR="${DESTDIR}"
+    make "${MAKEJOBS}" MAKEINFO=true DESTDIR="${DESTDIR}"
 }
 
 src_install() {
diff --git a/sysc/init b/sysc/init
index 13aeb4b..6a6ef41 100755
--- a/sysc/init
+++ b/sysc/init
@@ -21,6 +21,8 @@ export SOURCE_DATE_EPOCH=0
 # shellcheck source=sysa/helpers.sh
 . "${SOURCES}/helpers.sh"
 
+MAKEJOBS="-j${JOBS}"
+
 echo
 echo "Installing packages into sysc"
 
@@ -75,6 +77,7 @@ SOURCES=${SOURCES}
 DESTDIR=${DESTDIR}
 DISTFILES=${DISTFILES}
 SRCDIR=${SRCDIR}
+MAKEJOBS=${MAKEJOBS}
 EOF
 
 exec ./run.sh
diff --git a/sysc/libarchive-3.5.2/libarchive-3.5.2.sh b/sysc/libarchive-3.5.2/libarchive-3.5.2.sh
index 6d9137c..3c270b2 100755
--- a/sysc/libarchive-3.5.2/libarchive-3.5.2.sh
+++ b/sysc/libarchive-3.5.2/libarchive-3.5.2.sh
@@ -14,7 +14,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/libtool-2.4.7/libtool-2.4.7.sh b/sysc/libtool-2.4.7/libtool-2.4.7.sh
index ac3269f..9e34141 100755
--- a/sysc/libtool-2.4.7/libtool-2.4.7.sh
+++ b/sysc/libtool-2.4.7/libtool-2.4.7.sh
@@ -35,7 +35,7 @@ src_configure() {
 }
 
 src_compile() {
-    make AUTOM4TE=autom4te-2.69 MAKEINFO=true
+    make "${MAKEJOBS}" AUTOM4TE=autom4te-2.69 MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/make-4.2.1/make-4.2.1.sh b/sysc/make-4.2.1/make-4.2.1.sh
index fc44db5..fa29286 100755
--- a/sysc/make-4.2.1/make-4.2.1.sh
+++ b/sysc/make-4.2.1/make-4.2.1.sh
@@ -21,7 +21,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO="true"
+    make "${MAKEJOBS}" MAKEINFO="true"
 }
 
 src_install() {
diff --git a/sysc/mpc-1.2.1/mpc-1.2.1.sh b/sysc/mpc-1.2.1/mpc-1.2.1.sh
index 24d5fa5..4a5b378 100755
--- a/sysc/mpc-1.2.1/mpc-1.2.1.sh
+++ b/sysc/mpc-1.2.1/mpc-1.2.1.sh
@@ -17,7 +17,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true DESTDIR="${DESTDIR}"
+    make "${MAKEJOBS}" MAKEINFO=true DESTDIR="${DESTDIR}"
 }
 
 src_install() {
diff --git a/sysc/mpfr-4.1.0/mpfr-4.1.0.sh b/sysc/mpfr-4.1.0/mpfr-4.1.0.sh
index 8c96021..0e6b53e 100755
--- a/sysc/mpfr-4.1.0/mpfr-4.1.0.sh
+++ b/sysc/mpfr-4.1.0/mpfr-4.1.0.sh
@@ -20,7 +20,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true DESTDIR="${DESTDIR}"
+    make "${MAKEJOBS}" MAKEINFO=true DESTDIR="${DESTDIR}"
 }
 
 src_install() {
diff --git a/sysc/musl-1.2.3/musl-1.2.3.sh b/sysc/musl-1.2.3/musl-1.2.3.sh
index 6dbe7e7..b51c8fc 100755
--- a/sysc/musl-1.2.3/musl-1.2.3.sh
+++ b/sysc/musl-1.2.3/musl-1.2.3.sh
@@ -13,7 +13,7 @@ src_configure() {
 }
 
 src_compile() {
-    make CROSS_COMPILE=
+    make "${MAKEJOBS}" CROSS_COMPILE=
 }
 
 src_install() {
diff --git a/sysc/patch-2.7.6/patch-2.7.6.sh b/sysc/patch-2.7.6/patch-2.7.6.sh
index 529e09d..e66036a 100755
--- a/sysc/patch-2.7.6/patch-2.7.6.sh
+++ b/sysc/patch-2.7.6/patch-2.7.6.sh
@@ -16,7 +16,7 @@ src_configure() {
 }
 
 src_compile() {
-    make MAKEINFO=true
+    make "${MAKEJOBS}" MAKEINFO=true
 }
 
 src_install() {
diff --git a/sysc/python-2.0.1/stage1.sh b/sysc/python-2.0.1/stage1.sh
index f22014a..7a658a8 100755
--- a/sysc/python-2.0.1/stage1.sh
+++ b/sysc/python-2.0.1/stage1.sh
@@ -36,11 +36,11 @@ src_configure() {
 src_compile() {
     # Build pgen
     pushd Parser
-    make pgen
+    make -j1 pgen
     popd
     # Regen graminit.c and graminit.h
     pushd Grammar
-    make graminit.c
+    make -j1 graminit.c
     popd
 
     # Regenerate some Python scripts using the other regenerated files 
@@ -56,7 +56,7 @@ src_compile() {
     mv Lib/token.py.new Lib/token.py
 
     # Now build the main program
-    make
+    make -j1
 }
 
 src_install() {
diff --git a/sysc/python-2.0.1/stage2.sh b/sysc/python-2.0.1/stage2.sh
index 1ed2585..e6dc783 100755
--- a/sysc/python-2.0.1/stage2.sh
+++ b/sysc/python-2.0.1/stage2.sh
@@ -35,11 +35,11 @@ src_configure() {
 src_compile() {
     # Build pgen
     pushd Parser
-    make pgen
+    make -j1 pgen
     popd
     # Regen graminit.c and graminit.h
     pushd Grammar
-    make graminit.c
+    make -j1 graminit.c
     popd
 
     # Regenerate some Python scripts using the other regenerated files
@@ -55,7 +55,7 @@ src_compile() {
     mv Lib/token.py.new Lib/token.py
 
     # Now build the main program
-    make
+    make -j1
 }
 
 src_install() {
diff --git a/sysc/python-2.3.7/stage1.sh b/sysc/python-2.3.7/stage1.sh
index 7f9ad9c..ab679de 100755
--- a/sysc/python-2.3.7/stage1.sh
+++ b/sysc/python-2.3.7/stage1.sh
@@ -46,9 +46,9 @@ src_configure() {
 
 src_compile() {
     # Build pgen
-    make Parser/pgen
+    make "${MAKEJOBS}" Parser/pgen
     # Regen graminit.c and graminit.h
-    make Include/graminit.h
+    make "${MAKEJOBS}" Include/graminit.h
 
     # Regenerate some Python scripts using the other regenerated files
     # Must move them out to avoid using Lib/ module files which are
@@ -59,7 +59,7 @@ src_compile() {
     python token.py
 
     # Now build the main program
-    make CFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-2.3.7/stage2.sh b/sysc/python-2.3.7/stage2.sh
index e5f6bea..7c808f1 100755
--- a/sysc/python-2.3.7/stage2.sh
+++ b/sysc/python-2.3.7/stage2.sh
@@ -47,9 +47,9 @@ src_configure() {
 
 src_compile() {
     # Build pgen
-    make Parser/pgen
+    make "${MAKEJOBS}" Parser/pgen
     # Regen graminit.c and graminit.h
-    make Include/graminit.h
+    make "${MAKEJOBS}" Include/graminit.h
 
     # Regenerate some Python scripts using the other regenerated files
     # Must move them out to avoid using Lib/ module files which are
@@ -60,7 +60,7 @@ src_compile() {
     python token.py
 
     # Now build the main program
-    make CFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-2.5.6/python-2.5.6.sh b/sysc/python-2.5.6/python-2.5.6.sh
index dde40ba..1344492 100755
--- a/sysc/python-2.5.6/python-2.5.6.sh
+++ b/sysc/python-2.5.6/python-2.5.6.sh
@@ -58,9 +58,9 @@ src_compile() {
     # Temporarily break include cycle
     patch -Np0 -i graminit-regen.patch
     # Build pgen
-    make Parser/pgen
+    make "${MAKEJOBS}" Parser/pgen
     # Regen graminit.c and graminit.h
-    make Include/graminit.h
+    make "${MAKEJOBS}" Include/graminit.h
 
     # Regenerate some Python scripts using the other regenerated files
     # Must move them out to avoid using Lib/ module files which are
@@ -73,7 +73,7 @@ src_compile() {
     # Undo change
     patch -Np0 -R -i graminit-regen.patch
     # Now build the main program
-    make CFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-3.1.5/stage1.sh b/sysc/python-3.1.5/stage1.sh
index 7b60226..40fb1ac 100755
--- a/sysc/python-3.1.5/stage1.sh
+++ b/sysc/python-3.1.5/stage1.sh
@@ -52,9 +52,9 @@ src_compile() {
     # Temporarily break include cycle
     patch -Np0 -i graminit-regen.patch
     # Build pgen
-    make Parser/pgen
+    make "${MAKEJOBS}" Parser/pgen
     # Regen graminit.c and graminit.h
-    make Include/graminit.h
+    make "${MAKEJOBS}" Include/graminit.h
 
     # Regenerate some Python scripts using the other regenerated files
     # Must move them out to avoid using Lib/ module files which are
@@ -67,7 +67,7 @@ src_compile() {
     # Undo change
     patch -Np0 -R -i graminit-regen.patch
     # Now build the main program
-    make CFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-3.1.5/stage2.sh b/sysc/python-3.1.5/stage2.sh
index 6b934fa..e8011a6 100755
--- a/sysc/python-3.1.5/stage2.sh
+++ b/sysc/python-3.1.5/stage2.sh
@@ -57,9 +57,9 @@ src_compile() {
     # Temporarily break include cycle
     patch -Np0 -i graminit-regen.patch
     # Build pgen
-    make Parser/pgen
+    make "${MAKEJOBS}" Parser/pgen
     # Regen graminit.c and graminit.h
-    make Include/graminit.h
+    make "${MAKEJOBS}" Include/graminit.h
 
     # Regenerate some Python scripts using the other regenerated files
     # Must move them out to avoid using Lib/ module files which are
@@ -72,7 +72,7 @@ src_compile() {
     # Undo change
     patch -Np0 -R -i graminit-regen.patch
     # Now build the main program
-    make CFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-3.11.1/python-3.11.1.sh b/sysc/python-3.11.1/python-3.11.1.sh
index 10f11a0..869f3f1 100755
--- a/sysc/python-3.11.1/python-3.11.1.sh
+++ b/sysc/python-3.11.1/python-3.11.1.sh
@@ -69,7 +69,7 @@ src_compile() {
     # We have to choose the order ourselves because the Makefile is extremely lax about the order
     # First of all, do everything that doesn't use any C
     rm Modules/_blake2/blake2s_impl.c
-    make regen-opcode \
+    make "${MAKEJOBS}" regen-opcode \
         regen-opcode-targets \
         regen-typeslots \
         regen-token \
@@ -82,17 +82,17 @@ src_compile() {
         regen-global-objects
 
     # Do the freeze regen process
-    make regen-frozen
-    make regen-deepfreeze
-    make regen-global-objects
+    make "${MAKEJOBS}" regen-frozen
+    make "${MAKEJOBS}" regen-deepfreeze
+    make "${MAKEJOBS}" regen-global-objects
 
-    make CPPFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CPPFLAGS="-U__DATE__ -U__TIME__"
 
     # Regen Python/stdlib_module_names.h (you must have an existing build first)
-    make regen-stdlib-module-names
+    make "${MAKEJOBS}" regen-stdlib-module-names
 
     # Now rebuild with proper stdlib_module_names.h
-    make CPPFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CPPFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-3.3.7/python-3.3.7.sh b/sysc/python-3.3.7/python-3.3.7.sh
index 4821d40..c754a75 100755
--- a/sysc/python-3.3.7/python-3.3.7.sh
+++ b/sysc/python-3.3.7/python-3.3.7.sh
@@ -55,9 +55,9 @@ src_configure() {
 
 src_compile() {
     # Build pgen
-    make Parser/pgen
+    make "${MAKEJOBS}" Parser/pgen
     # Regen graminit.c and graminit.h
-    make Include/graminit.h
+    make "${MAKEJOBS}" Include/graminit.h
 
     # Regenerate some Python scripts using the other regenerated files
     # Must move them out to avoid using Lib/ module files which are
@@ -69,7 +69,7 @@ src_compile() {
     python token.py
 
     # Now build the main program
-    make CFLAGS="-U__DATE__ -U__TIME__"
+    make -j1 CFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-3.4.10/python-3.4.10.sh b/sysc/python-3.4.10/python-3.4.10.sh
index 813a8bd..ee4e43d 100755
--- a/sysc/python-3.4.10/python-3.4.10.sh
+++ b/sysc/python-3.4.10/python-3.4.10.sh
@@ -58,9 +58,9 @@ src_configure() {
 
 src_compile() {
     # Build pgen
-    make Parser/pgen
+    make -j1 Parser/pgen
     # Regen graminit.c and graminit.h
-    make Include/graminit.h
+    make "${MAKEJOBS}" Include/graminit.h
 
     # Regenerate some Python scripts using the other regenerated files
     # Must move them out to avoid using Lib/ module files which are
@@ -72,7 +72,7 @@ src_compile() {
     python token.py
 
     # Now build the main program
-    make CFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/python-3.8.16/python-3.8.16.sh b/sysc/python-3.8.16/python-3.8.16.sh
index aa2e790..df4dd48 100755
--- a/sysc/python-3.8.16/python-3.8.16.sh
+++ b/sysc/python-3.8.16/python-3.8.16.sh
@@ -53,9 +53,9 @@ src_configure() {
 src_compile() {
     # Regenerations
     rm Modules/_blake2/blake2s_impl.c
-    make regen-all
+    make "${MAKEJOBS}" regen-all
 
-    make CPPFLAGS="-U__DATE__ -U__TIME__"
+    make "${MAKEJOBS}" CPPFLAGS="-U__DATE__ -U__TIME__"
 }
 
 src_install() {
diff --git a/sysc/tar-1.34/tar-1.34.sh b/sysc/tar-1.34/tar-1.34.sh
index 15d47f7..50e2514 100755
--- a/sysc/tar-1.34/tar-1.34.sh
+++ b/sysc/tar-1.34/tar-1.34.sh
@@ -27,7 +27,7 @@ src_configure() {
 }
 
 src_compile() {
-    make PREFIX="${PREFIX}" MAKEINFO="true"
+    make "${MAKEJOBS}" PREFIX="${PREFIX}" MAKEINFO="true"
 }
 
 src_install() {