diff --git a/README.md b/README.md
index 09f1527..c90e5a2 100644
--- a/README.md
+++ b/README.md
@@ -325,3 +325,8 @@ be useful later for autotools.
 
 `diffutils` is useful for comparing two files. It is not immediately needed but
 is required later for autotools.
+
+#### Part 27: coreutils 5.0
+
+`coreutils` is rebuilt against musl.  Additional utilities are built including
+`comm`, `expr`, `date`, `dd`, `sort`, `uname`, and `uniq`.
diff --git a/sysa/coreutils-5.0/coreutils-5.0.sh b/sysa/coreutils-5.0/coreutils-5.0.sh
new file mode 100755
index 0000000..ff9e412
--- /dev/null
+++ b/sysa/coreutils-5.0/coreutils-5.0.sh
@@ -0,0 +1,25 @@
+# SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_unpack() {
+    src_dir="${base_dir}/src"
+    tar -xf "${src_dir}/${pkg}.tar"
+}
+
+src_prepare() {
+    cp lib/fnmatch_.h lib/fnmatch.h
+    cp lib/ftw_.h lib/ftw.h
+    cp lib/search_.h lib/search.h
+    touch config.h
+
+    cp "${mk_dir}/pass2.mk" Makefile
+}
+
+src_compile() {
+    make -f Makefile
+}
+
+src_install() {
+    make -f Makefile install PREFIX="${PREFIX}"
+}
diff --git a/sysa/coreutils-5.0/mk/pass2.mk b/sysa/coreutils-5.0/mk/pass2.mk
new file mode 100644
index 0000000..4865425
--- /dev/null
+++ b/sysa/coreutils-5.0/mk/pass2.mk
@@ -0,0 +1,126 @@
+# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+# SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+PACKAGE=coreutils
+PACKAGE_NAME=GNU\ coreutils
+PACKAGE_BUGREPORT=bug-coreutils@gnu.org
+PACKAGE_VERSION=5.0
+VERSION=5.0
+
+CC      = tcc
+LD      = tcc
+AR      = tcc -ar
+
+bindir=/after/bin
+
+CFLAGS  = -I . -I lib \
+          -DPACKAGE=\"$(PACKAGE)\" \
+          -DPACKAGE_NAME=\"$(PACKAGE_NAME)\" \
+          -DGNU_PACKAGE=\"$(PACKAGE_NAME)\" \
+          -DPACKAGE_BUGREPORT=\"$(PACKAGE_BUGREPORT)\" \
+          -DPACKAGE_VERSION=\"$(PACKAGE_VERSION)\" \
+          -DHOST_OPERATING_SYSTEM=\"Linux\" \
+          -DVERSION=\"$(VERSION)\" \
+          -DHAVE_LIMITS_H=1 \
+          -DHAVE_DECL_FREE=1 \
+          -DHAVE_LONG_LONG=1 \
+          -DHAVE_UNSIGNED_LONG_LONG=1 \
+          -DHAVE_DECL_MALLOC=1 \
+          -DHAVE_DECL_STRERROR=1 \
+          -DHAVE_STRERROR=1 \
+          -DHAVE_MALLOC=1 \
+          -DHAVE_STDLIB_H=1 \
+          -DHAVE_WCHAR_H=1 \
+          -DHAVE_SYS_TYPES_H=1 \
+          -DHAVE_REALLOC=1 \
+          -DHAVE_DECL_REALLOC=1 \
+          -DHAVE_DECL_GETENV=1 \
+          -DHAVE_DIRENT_H=1 \
+          -DHAVE_DECL___FPENDING=0 \
+          -DSTDC_HEADERS=1 \
+          -DHAVE_ALLOCA_H=1 \
+          -DHAVE_STRUCT_TIMESPEC=1 \
+          -DHAVE_STRING_H=1 \
+          -DHAVE_SYS_TIME_H=1 \
+          -DHAVE_SETLOCALE=1 \
+          -DHAVE_LOCALE_H=1 \
+          -DTIME_WITH_SYS_TIME=1 \
+          -DHAVE_STDINT_H=1 \
+          -DMB_LEN_MAX=16 \
+          -DLIBDIR=\"/after/lib\" \
+          -DHAVE_DECL_WCWIDTH=0 \
+          -DHAVE_SYS_STAT_H=1 \
+          -DHAVE_INTTYPES_H=1 \
+          -DHAVE_DECL_MEMCHR=1 \
+          -DHAVE_MEMORY_H=1 \
+          -DPENDING_OUTPUT_N_BYTES=1 \
+          -DCHAR_MIN=0 \
+          -DLOCALEDIR=NULL \
+          -DHAVE_FCNTL_H=1 \
+          -DEPERM=1 \
+          -DHAVE_DECL_STRTOUL=1 \
+          -DHAVE_DECL_STRTOULL=1 \
+          -DHAVE_DECL_STRTOL=1 \
+          -DHAVE_DECL_STRTOLL=1 \
+          -DHAVE_RMDIR=1 \
+          -DRMDIR_ERRNO_NOT_EMPTY=39 \
+          -DHAVE_DECL_FREE=1 \
+          -DENOTEMPTY=1 \
+          -DLSTAT_FOLLOWS_SLASHED_SYMLINK=1 \
+          -DHAVE_DECL_DIRFD=1 \
+          -DLC_TIME=\"C\" \
+          -DLC_COLLATE=\"C\" \
+          -DHAVE_GETCWD=1 \
+          -Dmy_strftime=nstrftime \
+          -DDIR_TO_FD\(Dir_p\)=-1 \
+          -DUTILS_OPEN_MAX=1000 \
+          -Dmajor_t=unsigned \
+          -Dminor_t=unsigned
+
+.PHONY: all install
+
+SRC_DIR=src
+
+COREUTILS = basename cat chmod cksum comm csplit cut date dd echo expand expr factor false fmt fold head id join kill link ln logname mkfifo mkdir mknod nl od paste pathchk printf ptx pwd readlink rmdir seq sleep sort split sum tail tee touch tr tsort uname unexpand uniq unlink wc whoami test true yes
+
+BINARIES = $(addprefix $(SRC_DIR)/, $(COREUTILS))
+
+ALL=$(BINARIES) $(SRC_DIR)/ls $(SRC_DIR)/install $(SRC_DIR)/md5sum $(SRC_DIR)/mv $(SRC_DIR)/rm $(SRC_DIR)/sha1sum
+all: $(BINARIES) $(SRC_DIR)/ls $(SRC_DIR)/install $(SRC_DIR)/md5sum $(SRC_DIR)/mv $(SRC_DIR)/rm $(SRC_DIR)/sha1sum
+
+LIB_DIR = lib
+LIB_SRC = acl alloca getdate posixtm posixver strftime getopt getopt1 hash hash-pjw addext argmatch backupfile basename canon-host closeout cycle-check diacrit dirname dup-safer error exclude exitfail filemode __fpending file-type fnmatch fopen-safer full-read full-write getline getstr gettime hard-locale human idcache isdir imaxtostr linebuffer localcharset long-options makepath mbswidth md5 memcasecmp memcoll modechange offtostr path-concat physmem quote quotearg readtokens rpmatch safe-read safe-write same save-cwd savedir settime sha stpcpy stripslash strtoimax strtoumax umaxtostr unicodeio userspec version-etc xgetcwd xgethostname xmalloc xmemcoll xnanosleep xreadlink xstrdup xstrtod xstrtol xstrtoul xstrtoimax xstrtoumax yesno strnlen getcwd sig2str mountlist regex canonicalize mkstemp memrchr euidaccess ftw obstack strverscmp strftime tsearch
+
+LIB_OBJECTS = $(addprefix $(LIB_DIR)/, $(addsuffix .o, $(LIB_SRC)))
+
+$(LIB_DIR)/libfettish.a: $(LIB_OBJECTS)
+	$(AR) cr $@ $^
+
+$(BINARIES) : % : %.o $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+$(SRC_DIR)/cp: $(SRC_DIR)/cp.o $(SRC_DIR)/copy.o $(SRC_DIR)/cp-hash.c $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+$(SRC_DIR)/install: $(SRC_DIR)/install.o $(SRC_DIR)/copy.o $(SRC_DIR)/cp-hash.c $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+$(SRC_DIR)/ls: $(SRC_DIR)/ls.o $(SRC_DIR)/ls-ls.o $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+$(SRC_DIR)/md5sum: $(SRC_DIR)/md5.o $(SRC_DIR)/md5sum.o $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+$(SRC_DIR)/mv: $(SRC_DIR)/mv.o $(SRC_DIR)/copy.o $(SRC_DIR)/remove.o $(SRC_DIR)/cp-hash.o $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+$(SRC_DIR)/rm: $(SRC_DIR)/rm.o $(SRC_DIR)/remove.o $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+$(SRC_DIR)/sha1sum: $(SRC_DIR)/sha1sum.o $(SRC_DIR)/md5sum.o $(LIB_DIR)/libfettish.a
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+install: $(ALL)
+	$(SRC_DIR)/install $^ $(bindir)
diff --git a/sysa/run.sh b/sysa/run.sh
index 8475704..511c89d 100755
--- a/sysa/run.sh
+++ b/sysa/run.sh
@@ -35,4 +35,7 @@ build grep-2.4
 # Part 26
 build diffutils-2.7
 
+# Part 27
+build coreutils-5.0
+
 echo "Bootstrapping completed."