diff --git a/HACKING b/HACKING
index 3038bfb7..d9e40bd4 100644
--- a/HACKING
+++ b/HACKING
@@ -21,7 +21,7 @@ slower than guile.  That's why we usually don't use mes during development.
 gcc is used to verify the sanity of our C sources.
 
 i686-unknown-linux-gnu-gcc is used to compare hex/assembly, to test
-the gcc variant of mlbic: libc/libc-gcc.c and steal ideas.
+the gcc variant of mlbic: mlibc/libc-gcc.c and steal ideas.
 
 guile is used to develop mescc, the C compiler in Scheme that during
 bootstrapping will be executed by mes.
diff --git a/make/bin.make b/make/bin.make
index c57bd4bc..7d2c6373 100644
--- a/make/bin.make
+++ b/make/bin.make
@@ -12,7 +12,7 @@ endif
 CLEAN+=$(O_FILES) $(OUT)/$(TARGET)
 DIST-CLEAN+=$(D_FILES)
 
-INCLUDES+=libc/include libc $(OUT)/$(DIR)
+INCLUDES+=mlibc/include mlibc $(OUT)/$(DIR)
 
 $(OUT)/$(TARGET): ld:=$(CROSS)LD
 $(OUT)/$(TARGET): LD:=$(CROSS)$(LD)
diff --git a/make/install.make b/make/install.make
index 17535db3..9b608241 100644
--- a/make/install.make
+++ b/make/install.make
@@ -100,9 +100,9 @@ endif
 	tar -cf- -C module $(INSTALL_GO_FILES:module/%=%)\
 		| tar -C $(DESTDIR)$(GODIR) -xf-
 	mkdir -p $(DESTDIR)$(PREFIX)/lib
-	$(GIT_ARCHIVE_HEAD) libc/include \
-		| tar -C $(DESTDIR)$(PREFIX) --strip=1 -xf-
-	cp out/libc/libc-mes.guile-o $(DESTDIR)$(PREFIX)/lib/libc-mes.o
+	$(GIT_ARCHIVE_HEAD) mlibc/include \
+		| tar -C $(DESTDIR)$(PREFIX)/share -xf-
+	cp out/mlibc/libc-mes.guile-o $(DESTDIR)$(PREFIX)/lib/libc-mes.o
 
 release: tree-clean-p check dist
 	git tag v$(VERSION)
diff --git a/make/mescc-guile.make b/make/mescc-guile.make
index f89e1601..76aa21d4 100644
--- a/make/mescc-guile.make
+++ b/make/mescc-guile.make
@@ -1,7 +1,7 @@
 ifneq ($(GUILE),)
 CROSS:=guile-
-C_FILES:=libc/libc-mes.c $(C_FILES)
-#C_FILES:=libc/mini-libc-mes.c $(C_FILES)
+C_FILES:=mlibc/libc-mes.c $(C_FILES)
+#C_FILES:=mlibc/mini-libc-mes.c $(C_FILES)
 O_FILES:=$(C_FILES:%.c=$(OUT)/%.$(CROSS)o)
 
 ifneq ($(DEBUG),)
@@ -14,7 +14,7 @@ CLEAN+=$(O_FILES) $(OUT)/$(TARGET)
 
 CLEAN+=$(OUT)/$(TARGET)
 
-INCLUDES+=libc/include libc $(OUT)/$(DIR)
+INCLUDES+=mlibc/include mlibc $(OUT)/$(DIR)
 MESCC.scm:=guile/mescc.scm
 MESLD.scm:=guile/mescc.scm
 
@@ -73,8 +73,8 @@ endef
 ifeq ($(MLIBC.scm),)
 MLIBC.scm:=DONE
 else
-C_FILES:=$(filter-out libc/libc-mes.c,$(C_FILES))
-C_FILES:=$(filter-out libc/mini-libc-mes.c,$(C_FILES))
+C_FILES:=$(filter-out mlibc/libc-mes.c,$(C_FILES))
+C_FILES:=$(filter-out mlibc/mini-libc-mes.c,$(C_FILES))
 endif
 
 ifneq ($(MESC_DIRECT),)
diff --git a/make/mescc-mes.make b/make/mescc-mes.make
index b6f49ac8..6f182f16 100644
--- a/make/mescc-mes.make
+++ b/make/mescc-mes.make
@@ -1,6 +1,6 @@
 ifneq ($(MES),)
 CROSS:=mes-
-C_FILES:=libc/libc-mes.c $(C_FILES)
+C_FILES:=mlibc/libc-mes.c $(C_FILES)
 O_FILES:=$(C_FILES:%.c=$(OUT)/%.$(CROSS)o)
 
 ifneq ($(DEBUG),)
@@ -13,7 +13,7 @@ CLEAN+=$(O_FILES) $(OUT)/$(TARGET)
 
 CLEAN+=$(OUT)/$(TARGET)
 
-INCLUDES+=libc/include libc $(OUT)/$(DIR)
+INCLUDES+=mlibc/include mlibc $(OUT)/$(DIR)
 MESCC.mes:=scripts/mescc.mes
 MESLD.mes:=scripts/mescc.mes
 
@@ -84,7 +84,7 @@ endef
 ifeq ($(MLIBC.mes),)
 MLIBC.mes:=DONE
 else
-C_FILES:=$(filter-out libc/libc-mes.c,$(C_FILES))
+C_FILES:=$(filter-out mlibc/libc-mes.c,$(C_FILES))
 endif
 
 ifneq ($(MESC_DIRECT),)
diff --git a/libc/include/assert.h b/mlibc/include/assert.h
similarity index 100%
rename from libc/include/assert.h
rename to mlibc/include/assert.h
diff --git a/libc/include/ctype.h b/mlibc/include/ctype.h
similarity index 100%
rename from libc/include/ctype.h
rename to mlibc/include/ctype.h
diff --git a/libc/include/dlfcn.h b/mlibc/include/dlfcn.h
similarity index 100%
rename from libc/include/dlfcn.h
rename to mlibc/include/dlfcn.h
diff --git a/libc/include/errno.h b/mlibc/include/errno.h
similarity index 100%
rename from libc/include/errno.h
rename to mlibc/include/errno.h
diff --git a/libc/include/fcntl.h b/mlibc/include/fcntl.h
similarity index 100%
rename from libc/include/fcntl.h
rename to mlibc/include/fcntl.h
diff --git a/libc/include/features.h b/mlibc/include/features.h
similarity index 100%
rename from libc/include/features.h
rename to mlibc/include/features.h
diff --git a/libc/include/inttypes.h b/mlibc/include/inttypes.h
similarity index 100%
rename from libc/include/inttypes.h
rename to mlibc/include/inttypes.h
diff --git a/libc/include/limits.h b/mlibc/include/limits.h
similarity index 100%
rename from libc/include/limits.h
rename to mlibc/include/limits.h
diff --git a/libc/include/math.h b/mlibc/include/math.h
similarity index 100%
rename from libc/include/math.h
rename to mlibc/include/math.h
diff --git a/libc/include/mlibc.h b/mlibc/include/mlibc.h
similarity index 100%
rename from libc/include/mlibc.h
rename to mlibc/include/mlibc.h
diff --git a/libc/include/setjmp.h b/mlibc/include/setjmp.h
similarity index 100%
rename from libc/include/setjmp.h
rename to mlibc/include/setjmp.h
diff --git a/libc/include/signal.h b/mlibc/include/signal.h
similarity index 100%
rename from libc/include/signal.h
rename to mlibc/include/signal.h
diff --git a/libc/include/stdarg.h b/mlibc/include/stdarg.h
similarity index 100%
rename from libc/include/stdarg.h
rename to mlibc/include/stdarg.h
diff --git a/libc/include/stdio.h b/mlibc/include/stdio.h
similarity index 100%
rename from libc/include/stdio.h
rename to mlibc/include/stdio.h
diff --git a/libc/include/stdlib.h b/mlibc/include/stdlib.h
similarity index 100%
rename from libc/include/stdlib.h
rename to mlibc/include/stdlib.h
diff --git a/libc/include/string.h b/mlibc/include/string.h
similarity index 100%
rename from libc/include/string.h
rename to mlibc/include/string.h
diff --git a/libc/include/strings.h b/mlibc/include/strings.h
similarity index 100%
rename from libc/include/strings.h
rename to mlibc/include/strings.h
diff --git a/libc/include/sys/cdefs.h b/mlibc/include/sys/cdefs.h
similarity index 100%
rename from libc/include/sys/cdefs.h
rename to mlibc/include/sys/cdefs.h
diff --git a/libc/include/sys/mman.h b/mlibc/include/sys/mman.h
similarity index 100%
rename from libc/include/sys/mman.h
rename to mlibc/include/sys/mman.h
diff --git a/libc/include/sys/stat.h b/mlibc/include/sys/stat.h
similarity index 100%
rename from libc/include/sys/stat.h
rename to mlibc/include/sys/stat.h
diff --git a/libc/include/sys/time.h b/mlibc/include/sys/time.h
similarity index 100%
rename from libc/include/sys/time.h
rename to mlibc/include/sys/time.h
diff --git a/libc/include/sys/timeb.h b/mlibc/include/sys/timeb.h
similarity index 100%
rename from libc/include/sys/timeb.h
rename to mlibc/include/sys/timeb.h
diff --git a/libc/include/sys/types.h b/mlibc/include/sys/types.h
similarity index 100%
rename from libc/include/sys/types.h
rename to mlibc/include/sys/types.h
diff --git a/libc/include/sys/ucontext.h b/mlibc/include/sys/ucontext.h
similarity index 100%
rename from libc/include/sys/ucontext.h
rename to mlibc/include/sys/ucontext.h
diff --git a/libc/include/time.h b/mlibc/include/time.h
similarity index 100%
rename from libc/include/time.h
rename to mlibc/include/time.h
diff --git a/libc/include/unistd.h b/mlibc/include/unistd.h
similarity index 100%
rename from libc/include/unistd.h
rename to mlibc/include/unistd.h
diff --git a/libc/libc-gcc.c b/mlibc/libc-gcc.c
similarity index 100%
rename from libc/libc-gcc.c
rename to mlibc/libc-gcc.c
diff --git a/libc/libc-mes.c b/mlibc/libc-mes.c
similarity index 100%
rename from libc/libc-mes.c
rename to mlibc/libc-mes.c
diff --git a/libc/mini-libc-mes.c b/mlibc/mini-libc-mes.c
similarity index 100%
rename from libc/mini-libc-mes.c
rename to mlibc/mini-libc-mes.c
diff --git a/module/language/c99/compiler.mes b/module/language/c99/compiler.mes
index e6353464..aba55d30 100644
--- a/module/language/c99/compiler.mes
+++ b/module/language/c99/compiler.mes
@@ -54,9 +54,9 @@
 (define mes? (pair? (current-module)))
 
 (define* (c99-input->full-ast #:key (defines '()) (includes '()))
-  (let ((include (if (equal? %prefix "") "libc/include" (string-append %prefix "/include"))))
+  (let ((include (if (equal? %prefix "") "mlibc/include" (string-append %prefix "/share/mlibc/include"))))
     (parse-c99
-     #:inc-dirs (append includes (cons* "." "libc" "src" "out" "out/src" include (string-split (getenv "C_INCLUDE_PATH") #\:)))
+     #:inc-dirs (append includes (cons* "." "mlibc" "src" "out" "out/src" include (string-split (getenv "C_INCLUDE_PATH") #\:)))
      #:cpp-defs `(
                   "POSIX=0"
                   "_POSIX_SOURCE=0"
diff --git a/scaffold/scaffold.make b/scaffold/scaffold.make
index fbf28f9a..803f424b 100644
--- a/scaffold/scaffold.make
+++ b/scaffold/scaffold.make
@@ -1,7 +1,7 @@
 TARGET:=m
 C_FILES:=$(DIR)/m.c
 DEFINES:=POSIX=1
-INCLUDES:=libc
+INCLUDES:=mlibc
 include make/bin.make
 
 TARGET:=m
@@ -11,7 +11,7 @@ include make/check.make
 TARGET:=hello
 C_FILES:=$(DIR)/hello.c
 DEFINES:=POSIX=1
-INCLUDES:=libc
+INCLUDES:=mlibc
 include make/bin.make
 
 TARGET:=hello
@@ -21,7 +21,7 @@ include make/check.make
 TARGET:=t
 C_FILES:=$(DIR)/t.c
 DEFINES:=POSIX=1
-INCLUDES:=libc
+INCLUDES:=mlibc
 include make/bin.make
 
 TARGET:=t
@@ -30,7 +30,7 @@ include make/check.make
 TARGET:=t-tcc
 C_FILES:=$(DIR)/t-tcc.c
 DEFINES:=POSIX=1
-INCLUDES:=libc
+INCLUDES:=mlibc
 include make/bin.make
 
 TARGET:=t-tcc
diff --git a/src/src.make b/src/src.make
index 0cf248ea..1e49cbd0 100644
--- a/src/src.make
+++ b/src/src.make
@@ -22,7 +22,7 @@ snarf-gcc: $(SNARF.GCC)
 $(OUT)/$(DIR)/mes.o: $(SNARF.GCC)
 
 DEFINES:=FIXED_PRIMITIVES=1 MES_FULL=1 POSIX=1 VERSION='"$(VERSION)"' MODULEDIR='"$(MODULEDIR)"' PREFIX='"$(PREFIX)"'
-INCLUDES:=libc $(OUT)/$(DIR)
+INCLUDES:=mlibc $(OUT)/$(DIR)
 TARGET:=mes
 C_FILES:=$(DIR)/mes.c
 include make/bin.make