github.yml.patch

diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 417a210..5fa3f49 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -12,6 +12,9 @@
 #
 # REGENDATA ("0.16.3",["github","cabal.project"])
 #
+# This file is patched to install the typediff utility from its repository
+# (see github.yml.patch).
+#
 name: Haskell-CI
 on:
   - push
@@ -136,6 +139,8 @@ jobs:
       - name: Set PATH and environment variables
         run: |
           echo "$HOME/.cabal/bin" >> $GITHUB_PATH
+          echo "$HOME/.local/bin" >> $GITHUB_PATH
+          echo "$HOME/.ghcup/bin" >> $GITHUB_PATH
           echo "LANG=C.UTF-8" >> "$GITHUB_ENV"
           echo "CABAL_DIR=$HOME/.cabal" >> "$GITHUB_ENV"
           echo "CABAL_CONFIG=$HOME/.cabal/config" >> "$GITHUB_ENV"
@@ -209,6 +214,11 @@ jobs:
           rm -f cabal-plan.xz
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
+      - name: install typediff
+        run: |
+          mkdir -p $HOME/.local/bin
+          curl -L https://github.com/haskell-compat/base-compat/releases/download/typediff-0.1.6/typediff > $HOME/.local/bin/typediff
+          chmod a+x $HOME/.local/bin/typediff
       - name: checkout
         uses: actions/checkout@v3
         with: