diff -Nu -Nu -uarN test/dev-tcltk/blt/blt-2.4z-r5.ebuild poverlay/dev-tcltk/blt/blt-2.4z-r5.ebuild
--- test/dev-tcltk/blt/blt-2.4z-r5.ebuild	2009-10-26 22:06:42.000000000 +0100
+++ poverlay/dev-tcltk/blt/blt-2.4z-r5.ebuild	2009-10-25 19:17:54.000000000 +0100
@@ -44,7 +44,7 @@
 	# bug 167934
 	append-flags -fPIC
 
-	econf --with-blt=/usr/$(get_libdir) || die "./configure failed"
+	econf --with-blt=${EROOT}/usr/$(get_libdir) || die "./configure failed"
 	# parallel borks
 	emake -j1 || die "emake failed"
 }