--- rep-gtk-0.18.4/Makefile.in
+++ rep-gtk-0.18.4/Makefile.in
@@ -34,7 +34,7 @@
 DESTDIR=
 installdir=$(repexecdir)
 
-libdir=@prefix@/@libdir@
+libdir=@libdir@
 
 top_srcdir=@top_srcdir@
 top_builddir=.