diff --git a/core/grub/build b/core/grub/build
index ac0505dc..68019e14 100755
--- a/core/grub/build
+++ b/core/grub/build
@@ -34,3 +34,6 @@ build_grub --with-platform=efi --disable-efiemu
     rm -f usr/lib/grub/*/gdb_grub
     rm -f usr/lib/grub/*/gmodule.pl
 ) ||:
+
+# Remove conflicting file.
+rm "$1/usr/lib/charset.alias"
diff --git a/core/m4/build b/core/m4/build
index 1f3ed8c6..0cc644a2 100755
--- a/core/m4/build
+++ b/core/m4/build
@@ -10,3 +10,6 @@ make DESTDIR="$1" install
 
 # Remove all info files.
 rm -rf "$1/usr/share/info"
+
+# Remove conflicting file.
+rm "$1/usr/lib/charset.alias"