fix to ubuntu work flow #3

	name: CI

	on:

	push:
	branches: [ master ]

	pull_request:
	branches: [ master ]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	jobs:

	build-test:

	strategy:
	matrix:
	os: [ubuntu-20.04, macos-latest]
	mlcomp: [mlkit, mlton]

	runs-on: ${{ matrix.os }}

	steps:

	- uses: actions/checkout@v2

	- name: Setup environment
	run: \|
	echo "OS=$(uname -s \| tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
	echo "RUNHOME=$(echo $HOME)" >> $GITHUB_ENV

	- name: Install MLKit and smlpkg
	working-directory: ${{ env.RUNHOME }}
	run: \|
	echo "[OS: $OS, HOME: $RUNHOME]"
	wget https://github.com/diku-dk/smlpkg/releases/download/v0.1.4/smlpkg-bin-dist-${{env.OS}}.tgz
	tar xzf smlpkg-bin-dist-${{env.OS}}.tgz
	echo "$HOME/smlpkg-bin-dist-${{env.OS}}/bin" >> $GITHUB_PATH
	wget https://github.com/melsman/mlkit/releases/download/v4.5.4/mlkit-bin-dist-${{env.OS}}.tgz
	tar xzf mlkit-bin-dist-${{env.OS}}.tgz
	echo "$HOME/mlkit-bin-dist-${{env.OS}}/bin" >> $GITHUB_PATH
	mkdir -p .mlkit
	echo "SML_LIB $HOME/mlkit-bin-dist-${{env.OS}}/lib/mlkit" > .mlkit/mlb-path-map

	- name: Check
	run: \|
	mlkit --version
	smlpkg --version

	- name: Install MLton (linux)
	if: ${{ env.OS == 'linux' && matrix.mlcomp == 'mlton' }}
	run: \|
	sudo apt-get install -y mlton
	mlton

	- name: Install MLton (macos)
	if: ${{ env.OS == 'darwin' && matrix.mlcomp == 'mlton' }}
	run: \|
	brew install mlton
	mlton

	- name: Build
	run: MLCOMP=${{ matrix.mlcomp }} make clean all

	- name: Run tests
	run: MLCOMP=${{ matrix.mlcomp }} make test

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