Use pre-installed haskell stack

Copy fpm to /usr/local/bin on ubuntu

Author: LKedward

.github/workflows/CI.yml

@@ -49,28 +49,6 @@ jobs:
           which gfortran-${GCC_V}
           which gfortran
 
-    - name: Install Haskell macOS
-      if: contains(matrix.os, 'macos')
-      run: |
-          mkdir /Users/runner/.local/bin
-          curl -L https://github.com/commercialhaskell/stack/releases/download/v2.3.3/stack-2.3.3-osx-x86_64.tar.gz | tar xz --strip-components=1 --include '*/stack' -C /Users/runner/.local/bin
-
-    - name: Install Haskell Linux
-      if: contains(matrix.os, 'ubuntu')
-      run: |
-          mkdir -p /home/runner/.local/bin
-          curl -L https://github.com/commercialhaskell/stack/releases/download/v2.3.3/stack-2.3.3-linux-x86_64.tar.gz | tar --strip-components 1 --wildcards -xz */stack -C /home/runner/.local/bin
-
-    - name: Install Haskell Windows
-      if: contains(matrix.os, 'windows')
-      run: |
-          (New-Object System.Net.WebClient).DownloadFile("https://github.com/commercialhaskell/stack/releases/download/v2.3.3/stack-2.3.3-windows-x86_64.zip", "windows-x86_64.zip")
-          mkdir stack-tmp
-          cd stack-tmp
-          unzip ..\windows-x86_64.zip
-          copy stack.exe "C:\Program Files\Git\usr\bin"
-          cd ..
-
     - name: Install GFortran Linux
       if: contains(matrix.os, 'ubuntu')
       run: |
@@ -107,6 +85,11 @@ jobs:
       run: |
           copy "C:\Users\runneradmin\AppData\Roaming\local\bin\fpm.exe" "C:\Program Files\Git\usr\bin"
 
+    - name: put fpm to PATH (Linux)
+      if: contains(matrix.os, 'ubuntu')
+      run: |
+          cp /home/runner/.local/bin/fpm /usr/local/bin
+          
     - name: Run tests on Haskell fpm
       run: |
         cd bootstrap