use haskell stack instead

Author: KommuSoft

.github/workflows/build-site.yml

@@ -18,7 +18,7 @@ jobs:
     - name: make bin directory
       run: mkdir -p /tmp/bin
     - name: install pandoc
-      run: stack install pandoc --resolver lts-8.10 --local-bin-path=/tmp/bin
+      run: stack install pandoc==3.1.12.3 --resolver lts-17.8 --local-bin-path=/tmp/bin
     - name: checkout code
       uses: actions/checkout@v2.3.1
     - name: build the site
@@ -42,11 +42,13 @@ jobs:
     - name: update package database
       run: sudo apt-get update
     - name: install required packages
-      run: sudo apt-get install ghc=8.8.4-3 cabal-install minify php php-curl yui-compressor
-    - name: update cabal
-      run: cabal update
+      run: sudo apt-get install haskell-stack php php-curl minify yui-compressor
+    - name: stack update
+      run: stack update
+    - name: make bin directory
+      run: mkdir -p /tmp/bin
     - name: install pandoc
-      run: cabal install pandoc pandoc-cli --installdir=/tmp/bin
+      run: stack install pandoc==3.1.12.3 --resolver lts-17.8 --local-bin-path=/tmp/bin
     - name: checkout code
       uses: actions/checkout@v2.3.1
     - name: build the site