--- a/ffbuild/pkgconfig_generate.sh
+++ b/ffbuild/pkgconfig_generate.sh
@@ -28,9 +28,9 @@ version=$(grep ${name}_VERSION= $name/${
 
 cat <<EOF > $name/$fullname.pc
 prefix=$prefix
-exec_prefix=\${prefix}
-libdir=$libdir
-includedir=$incdir
+exec_prefix=${prefix}
+libdir=\${exec_prefix}/lib
+includedir=\${prefix}/include
 
 Name: $fullname
 Description: $comment