May I suggest the following trivial patch? diff -r ff9e591a2aa5 src/lib/Makefile.am --- a/src/lib/Makefile.am Sun Nov 18 21:44:22 2007 +0200 +++ b/src/lib/Makefile.am Tue Nov 20 00:29:04 2007 +0600 @@ -4,9 +4,9 @@ BUILT_SOURCES = unicodemap.c EXTRA_DIST = unicodemap.c unicodemap.pl -unicodemap.c: +$(srcdir)/unicodemap.c: test -f UnicodeData.txt || wget http://www.unicode.org/Public/UNIDATA/UnicodeData.txt - perl unicodemap.pl < UnicodeData.txt > $@ + perl $(srcdir)/unicodemap.pl < UnicodeData.txt > $@ liblib_a_SOURCES = \ backtrace-string.c \