Index: gap-4r9p3/cnf/gac.in
===================================================================
--- gap-4r9p3.orig/cnf/gac.in
+++ gap-4r9p3/cnf/gac.in
@@ -51,10 +51,10 @@
 SHELL="@SHELL@"
 
 # absolute path of the directory in which GAP was compiled
-abs_top_builddir="@abs_top_builddir@"
+abs_top_builddir="@GAP_BIN@"
 
 # path of the directory the GAP sources contained in
-abs_top_srcdir="@abs_top_srcdir@"
+abs_top_srcdir=/usr/lib/gap/src
 
 #
 libdir="@libdir@"
@@ -70,7 +70,7 @@ c_compiler="$libtool --mode=compile $CC"
 c_linker="$libtool --mode=link $CC"
 
 # read sysinfo.gap, which should set GAP_CFLAGS, GAP_CPPFLAGS, GAP_LDFLAGS, GAP_LIBS
-. "${abs_top_builddir}/sysinfo.gap"
+. "/usr/lib/gap/sysinfo.gap"
 
 # These will need special care
 c_dyn_linker="$libtool --mode=link $CC -module -avoid-version -rpath $libdir"
