diff --git a/windows/vars.sh b/windows/vars.sh
index 55e3aa29..f1f726d2 100644
--- a/windows/vars.sh
+++ b/windows/vars.sh
@@ -7,4 +7,5 @@ export PATH="$DIR/build-${MKXPZ_PREFIX}/bin:$PATH"
 MKXPZ_OLD_PC=$(pkg-config --variable pc_path pkg-config)
 
 # Try to load the stuff we built first
-export PKG_CONFIG_PATH="$DIR/build-${MKXPZ_PREFIX}/lib/pkgconfig"
\ No newline at end of file
+export PKG_CONFIG_PATH="$DIR/build-${MKXPZ_PREFIX}/lib/pkgconfig"
+export MKXPZ_PREFIX="$DIR/build-${MKXPZ_PREFIX}"
\ No newline at end of file