diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index 1bf718b6070..dfa3be2c645 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -25,12 +25,6 @@ jobs:
         echo "BINARY_CACHE_THREADS: $BINARY_CACHE_THREADS"
         echo "BINARY_CACHE_URI: $BINARY_CACHE_URI"
 
-    - uses: msys2/setup-msys2@v2
-      if: matrix.os == 'windows-latest'
-      with:
-        update: true
-        install: autoconf
-
     - uses: actions/setup-haskell@v1
       id: setup-haskell
       with:
@@ -75,25 +69,14 @@ jobs:
     - name: Select build directory
       run: echo "::set-output name=CABAL_BUILDDIR::dist"
 
-    - name: Install dependencies (Posix)
+    - name: Install dependencies
       if: matrix.os != 'windows-latest'
       run: cabal build all --builddir dist --enable-tests --enable-benchmarks --write-ghc-environment-files=always --only-dependencies
 
-    - name: Install dependencies (Windows)
-      if: matrix.os == 'windows-latest'
-      run: |
-        echo "Path bash: $PATH"
-        msys2 -c 'echo "Path msys2: $PATH"'
-        msys2 -c "cabal build all --builddir dist --enable-tests --enable-benchmarks --write-ghc-environment-files=always --only-dependencies"
-
-    - name: Build (Posix)
+    - name: Build
       if: matrix.os != 'windows-latest'
       run: cabal build all --builddir dist --enable-tests --enable-benchmarks --write-ghc-environment-files=always
 
-    - name: Build (Windows)
-      if: matrix.os == 'windows-latest'
-      run: msys2 -c "cabal build all --builddir dist --enable-tests --enable-benchmarks --write-ghc-environment-files=always"
-
     - name: Save cabal cache
       uses: haskell-works/cabal-cache-action@v1
       if: ${{ always() }}