ports/util-vinix: Work around parallel builds failing

Author: mintsuki

recipes/util-vinix

@@ -10,7 +10,7 @@ deps="core-libs"
 build() {
     cp -rp "${source_dir}"/. ./
 
-    make -j${parallelism} \
+    make -j1 \
         PROD="$PROD" \
         CC=${OS_TRIPLET}-gcc \
         VFLAGS="-os vinix -gc none" \