Fix building when $PATH contains spaces

build-mingw-w64-libraries.sh

@@ -9,7 +9,7 @@ fi
 PREFIX="$1"
 mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
-export PATH=$PREFIX/bin:$PATH
+export PATH="$PREFIX/bin:$PATH"
 
 : ${CORES:=$(nproc 2>/dev/null)}
 : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}