diff --git a/.github/workflows/haskell-ci-hlint.patch b/.github/workflows/haskell-ci-hlint.patch
deleted file mode 100644
index fc9f1640ba..0000000000
--- a/.github/workflows/haskell-ci-hlint.patch
+++ /dev/null
@@ -1,16 +0,0 @@
-Work around an hlint bug where it does not recognise CPP when
-Haskell2010 is passed to it; see
-
-    https://github.com/ndmitchell/hlint/issues/1360
-
---- a/.github/workflows/haskell-ci.yml.orig
-+++ b/.github/workflows/haskell-ci.yml
-@@ -247,7 +247,7 @@
-           $CABAL v2-test $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --test-show-details=direct
-       - name: hlint
-         run: |
--          if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then (cd ${PKGDIR_xmonad_contrib} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 .) ; fi
-+          if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then (cd ${PKGDIR_xmonad_contrib} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 -XCPP .) ; fi
-       - name: cabal check
-         run: |
-           cd ${PKGDIR_xmonad_contrib} || false
diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index d8b0af0fef..8be142baf9 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -163,7 +163,7 @@ jobs:
       - name: cache (tools)
         uses: actions/cache@v2
         with:
-          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-d795995c
+          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-c0dbbd39
           path: ~/.haskell-ci-tools
       - name: install cabal-plan
         run: |
@@ -176,7 +176,7 @@ jobs:
           cabal-plan --version
       - name: install hlint
         run: |
-          if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then HLINTVER=$(cd /tmp && (${CABAL} v2-install -v $ARG_COMPILER --dry-run hlint  --constraint='hlint >=3.3 && <3.4' |  perl -ne 'if (/\bhlint-(\d+(\.\d+)*)\b/) { print "$1"; last; }')); echo "HLint version $HLINTVER" ; fi
+          if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then HLINTVER=$(cd /tmp && (${CABAL} v2-install -v $ARG_COMPILER --dry-run hlint  --constraint='hlint >=3.4 && <3.5' |  perl -ne 'if (/\bhlint-(\d+(\.\d+)*)\b/) { print "$1"; last; }')); echo "HLint version $HLINTVER" ; fi
           if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then if [ ! -e $HOME/.haskell-ci-tools/hlint-$HLINTVER/hlint ]; then echo "Downloading HLint version $HLINTVER"; mkdir -p $HOME/.haskell-ci-tools; curl --write-out 'Status Code: %{http_code} Redirects: %{num_redirects} Total time: %{time_total} Total Dsize: %{size_download}\n' --silent --location --output $HOME/.haskell-ci-tools/hlint-$HLINTVER.tar.gz "https://github.com/ndmitchell/hlint/releases/download/v$HLINTVER/hlint-$HLINTVER-x86_64-linux.tar.gz"; tar -xzv -f $HOME/.haskell-ci-tools/hlint-$HLINTVER.tar.gz -C $HOME/.haskell-ci-tools; fi ; fi
           if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then mkdir -p $CABAL_DIR/bin && ln -sf "$HOME/.haskell-ci-tools/hlint-$HLINTVER/hlint" $CABAL_DIR/bin/hlint ; fi
           if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then hlint --version ; fi
@@ -247,7 +247,7 @@ jobs:
           $CABAL v2-test $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --test-show-details=direct
       - name: hlint
         run: |
-          if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then (cd ${PKGDIR_xmonad_contrib} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 -XCPP .) ; fi
+          if [ $((HCNUMVER >= 90000 && HCNUMVER < 90200)) -ne 0 ] ; then (cd ${PKGDIR_xmonad_contrib} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 .) ; fi
       - name: cabal check
         run: |
           cd ${PKGDIR_xmonad_contrib} || false
diff --git a/cabal.haskell-ci b/cabal.haskell-ci
index 99531839f2..7e93e801bb 100644
--- a/cabal.haskell-ci
+++ b/cabal.haskell-ci
@@ -9,10 +9,10 @@ apt:
 hlint: True
 hlint-job: 9.0.2
 hlint-yaml: .hlint.yaml
+hlint-version: ==3.4.*
 
 github-patches:
   .github/workflows/haskell-ci-hackage.patch
-  .github/workflows/haskell-ci-hlint.patch
 
 raw-project
   optimization: False