diff --git a/build-mingw-w64.sh b/build-mingw-w64.sh
new file mode 100755
index 00000000..031d4218
--- /dev/null
+++ b/build-mingw-w64.sh
@@ -0,0 +1,141 @@
+#!/bin/bash
+
+set -e
+
+if [ -z "$1" ]; then
+    echo "Makes a local build of mingw-w64 in this directory and installs it to the given path."
+    echo ""
+    echo "usage:"
+    echo -e "\t$0 <installation path e.g. \$HOME/.local>"
+    exit 1
+fi
+
+if [ -z "$MAKEFLAGS" ]; then
+    JOBS=-j$(($(nproc) - 1))
+fi
+
+DST_DIR="$1"
+
+BINUTILS_VER=2.32
+BINUTILS_SRCTARBALL=binutils-$BINUTILS_VER.tar.xz
+BINUTILS_URL="https://ftp.gnu.org/gnu/binutils/$BINUTILS_SRCTARBALL"
+BINUTILS_SRCDIR=binutils-$BINUTILS_VER
+
+GCC_VER=9.2.0
+GCC_SRCTARBALL=gcc-$GCC_VER.tar.xz
+GCC_URL="https://ftp.gnu.org/gnu/gcc/gcc-$GCC_VER/$GCC_SRCTARBALL"
+GCC_SRCDIR=gcc-$GCC_VER
+
+MINGW_W64_GITVER=v6.0.0
+MINGW_W64_GITURL="git://git.code.sf.net/p/mingw-w64/mingw-w64"
+MINGW_W64_SRCDIR=mingw-w64-git
+
+function setup_src {
+    if [ ! -e "$BINUTILS_SRCTARBALL" ]; then
+        wget -O "$BINUTILS_SRCTARBALL" "$BINUTILS_URL"
+    fi
+
+    if [ ! -e "$BINUTILS_SRCDIR" ]; then
+        tar -xf "$BINUTILS_SRCTARBALL"
+    fi
+
+    if [ ! -e "$GCC_SRCTARBALL" ]; then
+        wget -O "$GCC_SRCTARBALL" "$GCC_URL"
+    fi
+
+    if [ ! -e "$GCC_SRCDIR" ]; then
+        tar -xf "$GCC_SRCTARBALL"
+    fi
+
+    if [ ! -e "$MINGW_W64_SRCDIR" ]; then
+        #shallow clone, we just want this one version
+        git clone -b $MINGW_W64_GITVER --depth 1 \
+            "$MINGW_W64_GITURL" "$MINGW_W64_SRCDIR"
+    fi
+}
+
+function build_arch {
+    BUILD_ARCH=$(gcc -dumpmachine) #machine which is building the compiler
+    HOST_ARCH=$1 #machine which will run the compiler
+    WIN32_TARGET_ARCH=$2 #machine which we are building for
+    NEWPATH=$DST_DIR/bin:$PATH
+
+    mkdir -p build-$WIN32_TARGET_ARCH/
+    pushd build-$WIN32_TARGET_ARCH/
+
+        mkdir -p binutils/
+        pushd binutils/
+            if [ ! -e Makefile ]; then
+                ../../$BINUTILS_SRCDIR/configure --prefix=$DST_DIR/ --build=$BUILD_ARCH --host=$HOST_ARCH --target=$WIN32_TARGET_ARCH --disable-multilib --enable-lto $BINUTILS_EXTRA_CONFIGURE
+            fi
+            make $JOBS configure-host
+            make $JOBS LDFLAGS=-all-static
+            make $JOBS install
+        popd
+
+        mkdir -p mingw-w64-headers/
+        pushd mingw-w64-headers/
+            if [ ! -e Makefile ]; then
+                PATH=$NEWPATH:$PATH ../../$MINGW_W64_SRCDIR/mingw-w64-headers/configure --prefix=$DST_DIR/$WIN32_TARGET_ARCH/ --host=$WIN32_TARGET_ARCH --enable-sdk=all --enable-secure-api --enable-idl $MINGW_W64_HEADERS_EXTRA_CONFIGURE
+            fi
+            PATH=$NEWPATH:$PATH make $JOBS install
+        popd
+
+        mkdir -p gcc/
+        pushd gcc/
+            if [ ! -e Makefile ]; then
+                #arguments mostly taken from Arch AUR mingw-w64-gcc PKGBUILD,
+                #except "--disable-dw2-exceptions" swapped for "--disable-sjlj-exceptions --with-dwarf2"
+                #for performance reasons on 32-bit
+                LDFLAGS=-static PATH=$NEWPATH:$PATH ../../$GCC_SRCDIR/configure --prefix=$DST_DIR/ \
+                    --build=$BUILD_ARCH --host=$HOST_ARCH --target=$WIN32_TARGET_ARCH --with-gnu-ld --with-gnu-as \
+                    --enable-languages=c,c++ --disable-multilib --enable-threads=posix --enable-fully-dynamic-string \
+                    --enable-libstdcxx-time=yes --enable-libstdcxx-filesystem-ts=yes --enable-cloog-backend=isl \
+                    --enable-lto --disable-sjlj-exceptions --with-dwarf2 \
+                    $GCC_EXTRA_CONFIGURE
+            fi
+            PATH=$NEWPATH make $JOBS all-gcc
+            PATH=$NEWPATH make $JOBS install-gcc
+        popd
+
+        mkdir -p mingw-w64-crt/
+        pushd mingw-w64-crt/
+            if [ ! -e Makefile ]; then
+                PATH=$NEWPATH ../../$MINGW_W64_SRCDIR/mingw-w64-crt/configure --prefix=$DST_DIR/$WIN32_TARGET_ARCH/ --host=$WIN32_TARGET_ARCH $MINGW_W64_CRT_EXTRA_CONFIGURE
+            fi
+            PATH=$NEWPATH make $JOBS
+            PATH=$NEWPATH make $JOBS install
+        popd
+
+        mkdir -p mingw-w64-winpthreads/
+        pushd mingw-w64-winpthreads/
+            if [ ! -e Makefile ]; then
+                PATH=$NEWPATH ../../$MINGW_W64_SRCDIR/mingw-w64-libraries/winpthreads/configure --prefix=$DST_DIR/$WIN32_TARGET_ARCH/ --host=$WIN32_TARGET_ARCH $MINGW_W64_WINPTHREADS_EXTRA_CONFIGURE
+            fi
+            PATH=$NEWPATH make $JOBS
+            PATH=$NEWPATH make $JOBS install
+        popd
+
+        pushd gcc/
+            #below steps require libgcc in default library location, but
+            #"canadian" build doesn't handle that, so install it explicitly
+            PATH=$NEWPATH make configure-target-libgcc
+            PATH=$NEWPATH make -C $WIN32_TARGET_ARCH/libgcc $JOBS
+            PATH=$NEWPATH make -C $WIN32_TARGET_ARCH/libgcc $JOBS install
+
+            PATH=$NEWPATH make $JOBS
+            PATH=$NEWPATH make $JOBS install
+        popd
+
+    popd
+}
+
+setup_src
+
+mkdir -p $DST_DIR
+
+build_arch i686-linux-gnu i686-w64-mingw32
+
+build_arch x86_64-linux-gnu x86_64-w64-mingw32
+
+echo "Done!"