diff --git a/repo/m4/build b/repo/m4/build
index 6daf22f8..536c4d50 100755
--- a/repo/m4/build
+++ b/repo/m4/build
@@ -1,5 +1,7 @@
 #!/bin/sh -e
 
+patch -p1 < m4-1.4.18-glibc-change-work-around.patch
+
 ./configure \
     --prefix=/usr
 
diff --git a/repo/m4/checksums b/repo/m4/checksums
index 00033add..42169f68 100644
--- a/repo/m4/checksums
+++ b/repo/m4/checksums
@@ -1 +1,2 @@
 ab2633921a5cd38e48797bf5521ad259bdc4b979078034a3b790d7fec5493fab  m4-1.4.18.tar.gz
+3e58f2208c5d5a2fdc61d4cff9a65eba823fe61d65e7c76ded689b15470755bd  m4-1.4.18-glibc-change-work-around.patch
diff --git a/repo/m4/manifest b/repo/m4/manifest
index 66a0e090..063b39f9 100644
--- a/repo/m4/manifest
+++ b/repo/m4/manifest
@@ -1,22 +1,23 @@
-/var/db/puke/m4/version
-/var/db/puke/m4/sources
-/var/db/puke/m4/checksums
-/var/db/puke/m4/build
-/var/db/puke/m4/manifest
-/var/db/puke/m4
-/var/db/puke
-/var/db
-/var
-/usr/bin/m4
+/usr
 /usr/bin
-/usr/share/man/man1/m4.1
-/usr/share/man/man1
-/usr/share/man
+/usr/bin/m4
+/usr/share
+/usr/share/info
+/usr/share/info/dir
 /usr/share/info/m4.info
 /usr/share/info/m4.info-1
 /usr/share/info/m4.info-2
-/usr/share/info
-/usr/share
-/usr/lib/charset.alias
-/usr/lib
-/usr
+/usr/share/man
+/usr/share/man/man1
+/usr/share/man/man1/m4.1
+/var
+/var/db
+/var/db/kiss
+/var/db/kiss/m4
+/var/db/kiss/m4/build
+/var/db/kiss/m4/checksums
+/var/db/kiss/m4/manifest
+/var/db/kiss/m4/patches
+/var/db/kiss/m4/patches/m4-1.4.18-glibc-change-work-around.patch
+/var/db/kiss/m4/sources
+/var/db/kiss/m4/version
diff --git a/repo/m4/patches/m4-1.4.18-glibc-change-work-around.patch b/repo/m4/patches/m4-1.4.18-glibc-change-work-around.patch
new file mode 100644
index 00000000..014c3cec
--- /dev/null
+++ b/repo/m4/patches/m4-1.4.18-glibc-change-work-around.patch
@@ -0,0 +1,115 @@
+diff -up m4-1.4.18/lib/fflush.c.orig m4-1.4.18/lib/fflush.c
+--- m4-1.4.18/lib/fflush.c.orig	2018-05-02 12:35:59.536851666 +0200
++++ m4-1.4.18/lib/fflush.c	2018-05-02 12:37:02.768958606 +0200
+@@ -33,7 +33,7 @@
+ #undef fflush
+
+
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+
+ /* Clear the stream's ungetc buffer, preserving the value of ftello (fp).  */
+ static void
+@@ -72,7 +72,7 @@ clear_ungetc_buffer (FILE *fp)
+
+ #endif
+
+-#if ! (defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)
++#if ! (defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)
+
+ # if (defined __sferror || defined __DragonFly__ || defined __ANDROID__) && defined __SNPT
+ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */
+@@ -148,7 +148,7 @@ rpl_fflush (FILE *stream)
+   if (stream == NULL || ! freading (stream))
+     return fflush (stream);
+
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+
+   clear_ungetc_buffer_preserving_position (stream);
+
+diff -up m4-1.4.18/lib/fpending.c.orig m4-1.4.18/lib/fpending.c
+--- m4-1.4.18/lib/fpending.c.orig	2018-05-02 12:35:32.305806774 +0200
++++ m4-1.4.18/lib/fpending.c	2018-05-02 12:35:44.944827347 +0200
+@@ -32,7 +32,7 @@ __fpending (FILE *fp)
+   /* Most systems provide FILE as a struct and the necessary bitmask in
+      <stdio.h>, because they need it for implementing getc() and putc() as
+      fast macros.  */
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   return fp->_IO_write_ptr - fp->_IO_write_base;
+ #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+   /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */
+diff -up m4-1.4.18/lib/fpurge.c.orig m4-1.4.18/lib/fpurge.c
+--- m4-1.4.18/lib/fpurge.c.orig	2018-05-02 12:38:13.586078669 +0200
++++ m4-1.4.18/lib/fpurge.c	2018-05-02 12:38:38.785121867 +0200
+@@ -62,7 +62,7 @@ fpurge (FILE *fp)
+   /* Most systems provide FILE as a struct and the necessary bitmask in
+      <stdio.h>, because they need it for implementing getc() and putc() as
+      fast macros.  */
+-# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   fp->_IO_read_end = fp->_IO_read_ptr;
+   fp->_IO_write_ptr = fp->_IO_write_base;
+   /* Avoid memory leak when there is an active ungetc buffer.  */
+diff -up m4-1.4.18/lib/freadahead.c.orig m4-1.4.18/lib/freadahead.c
+--- m4-1.4.18/lib/freadahead.c.orig	2016-12-31 14:54:41.000000000 +0100
++++ m4-1.4.18/lib/freadahead.c	2018-05-02 11:43:19.570336724 +0200
+@@ -25,7 +25,7 @@
+ size_t
+ freadahead (FILE *fp)
+ {
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   if (fp->_IO_write_ptr > fp->_IO_write_base)
+     return 0;
+   return (fp->_IO_read_end - fp->_IO_read_ptr)
+diff -up m4-1.4.18/lib/freading.c.orig m4-1.4.18/lib/freading.c
+--- m4-1.4.18/lib/freading.c.orig	2018-05-02 12:37:33.970011368 +0200
++++ m4-1.4.18/lib/freading.c	2018-05-02 12:37:59.393054359 +0200
+@@ -31,7 +31,7 @@ freading (FILE *fp)
+   /* Most systems provide FILE as a struct and the necessary bitmask in
+      <stdio.h>, because they need it for implementing getc() and putc() as
+      fast macros.  */
+-# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   return ((fp->_flags & _IO_NO_WRITES) != 0
+           || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
+               && fp->_IO_read_base != NULL));
+diff -up m4-1.4.18/lib/fseeko.c.orig m4-1.4.18/lib/fseeko.c
+--- m4-1.4.18/lib/fseeko.c.orig	2018-05-02 11:44:17.947460233 +0200
++++ m4-1.4.18/lib/fseeko.c	2018-05-02 12:39:49.537216897 +0200
+@@ -47,7 +47,7 @@ fseeko (FILE *fp, off_t offset, int when
+ #endif
+
+   /* These tests are based on fpurge.c.  */
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   if (fp->_IO_read_end == fp->_IO_read_ptr
+       && fp->_IO_write_ptr == fp->_IO_write_base
+       && fp->_IO_save_base == NULL)
+@@ -123,7 +123,7 @@ fseeko (FILE *fp, off_t offset, int when
+           return -1;
+         }
+
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+       fp->_flags &= ~_IO_EOF_SEEN;
+       fp->_offset = pos;
+ #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+diff -up m4-1.4.18/lib/stdio-impl.h.orig m4-1.4.18/lib/stdio-impl.h
+--- m4-1.4.18/lib/stdio-impl.h.orig	2016-12-31 14:54:42.000000000 +0100
++++ m4-1.4.18/lib/stdio-impl.h	2018-05-02 11:43:19.570336724 +0200
+@@ -18,6 +18,12 @@
+    the same implementation of stdio extension API, except that some fields
+    have different naming conventions, or their access requires some casts.  */
+
++/* Glibc 2.28 made _IO_IN_BACKUP private.  For now, work around this
++   problem by defining it ourselves.  FIXME: Do not rely on glibc
++   internals.  */
++#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN
++# define _IO_IN_BACKUP 0x100
++#endif
+
+ /* BSD stdio derived implementations.  */
+
diff --git a/repo/m4/sources b/repo/m4/sources
index fdbf54be..e12a3819 100644
--- a/repo/m4/sources
+++ b/repo/m4/sources
@@ -1 +1,2 @@
 ftp://ftp.gnu.org/gnu/m4/m4-1.4.18.tar.gz
+patches/m4-1.4.18-glibc-change-work-around.patch