diff --git a/sofort/tools/pkgconf.sh b/sofort/tools/pkgconf.sh
index 614fdec..392647a 100755
--- a/sofort/tools/pkgconf.sh
+++ b/sofort/tools/pkgconf.sh
@@ -20,6 +20,10 @@ else
 	prefix=$(dirname "$PKGCONF_INCLUDEDIR")
 	base=$(basename "$PKGCONF_INCLUDEDIR")
 
+	if [ "$prefix" = '/' ]; then
+		prefix=
+	fi
+
 	if [ "$prefix/$base" = "$PKGCONF_PREFIX/$base" ]; then
 		pkgconf_includedir='${prefix}/'"${base}"
 		pkgconf_cflags='-I${includedir}'
@@ -37,6 +41,10 @@ else
 	prefix=$(dirname "$PKGCONF_LIBDIR")
 	base=$(basename "$PKGCONF_LIBDIR")
 
+	if [ "$prefix" = '/' ]; then
+		prefix=
+	fi
+
 	if [ "$prefix/$base" = "$PKGCONF_EXEC_PREFIX/$base" ]; then
 		pkgconf_libdir='${exec_prefix}/'"${base}"
 	else