diff --git a/SysBuild/multimedia/ptlib b/SysBuild/multimedia/ptlib
index dedf520..296fafb 100644
--- a/SysBuild/multimedia/ptlib
+++ b/SysBuild/multimedia/ptlib
@@ -116,7 +116,7 @@ mk32() {
 }
 
 mk() {
-	sed -i -e "s:/share/pwlib:/lib/pwlib:g" Makefile.in
+	sed -i -e "s:/share/pwlib:/${LIBDIR}/pwlib:g" Makefile.in
 	CC="gcc $BUILDOPTIONS" \
 	CXX="g++ $BUILDOPTIONS" \
 	USE_ARCH=$UARCH \
@@ -127,7 +127,7 @@ mk() {
 		    --enable-v4l2 \
 		    --enable-alsa \
 		    --enable-oss \
-		    --libdir=\${prefix}/${LIBDIR} \
+		    --libdir=/usr/${LIBDIR} \
 		    --prefix=/usr
 	touch $TARGET
 	unset TARGET
@@ -141,8 +141,7 @@ postmk() {
 		tar -C $TMPROOT/usr/lib -cf - .| tar -C $TMPROOT/usr/lib64 -xvf -
 		rm -r $TMPROOT/usr/lib
 		mv $TMPROOT/usr/lib32 $TMPROOT/usr/lib
-		rm $TMPROOT/usr/bin/ptlib-config
-		ln -sf ../lib64/pwlib/make/ptlib-config $TMPROOT/usr/bin/ptlib-config-64
+		mv $TMPROOT/usr/bin/ptlib-config{,-64}
 		ln -sf multiarch_wrapper $TMPROOT/usr/bin/ptlib-config
 		mv -v $TMPROOT/usr/include/ptbuildopts{,-64}.h
 		cat > $TMPROOT/usr/include/ptbuildopts.h << "EOF"