diff --git a/.github/workflows/binaries-linux-x64-stack.yml b/.github/workflows/binaries-linux-x64-stack.yml
index 10121cd2f..6899ec778 100644
--- a/.github/workflows/binaries-linux-x64-stack.yml
+++ b/.github/workflows/binaries-linux-x64-stack.yml
@@ -106,6 +106,10 @@ jobs:
       run: |
         stack --allow-different-user setup --install-ghc
 
+    - name: List dep versions
+      run: |
+        $stack exec -- ghc-pkg list
+
     - name: Build with stack and run unit tests
       run: |
         stack --allow-different-user build --test --ghc-options='-optl-static -fPIC' --ghc-options=-Werror hledger      # || (echo "ERROR: building hledger failed"; false)
diff --git a/.github/workflows/binaries-mac-arm64.yml b/.github/workflows/binaries-mac-arm64.yml
index e7e8aaef4..98c06932f 100644
--- a/.github/workflows/binaries-mac-arm64.yml
+++ b/.github/workflows/binaries-mac-arm64.yml
@@ -122,6 +122,10 @@ jobs:
         $stack build --test --only-dependencies --dry-run
         $stack build --test --only-dependencies
 
+    - name: List dep versions
+      run: |
+        $stack exec -- ghc-pkg list
+
     - name: Build hledger and test unit tests, doc tests
       run: |
         $stack install --test --force-dirty --ghc-options=-fforce-recomp --ghc-options=-Werror
diff --git a/.github/workflows/binaries-mac-x64.yml b/.github/workflows/binaries-mac-x64.yml
index 5fe8aa42e..f49def1b0 100644
--- a/.github/workflows/binaries-mac-x64.yml
+++ b/.github/workflows/binaries-mac-x64.yml
@@ -118,6 +118,10 @@ jobs:
         $stack build --test --only-dependencies --dry-run
         $stack build --test --only-dependencies
 
+    - name: List dep versions
+      run: |
+        $stack exec -- ghc-pkg list
+
     - name: Build hledger and test unit tests, doc tests
       run: |
         $stack install --test --force-dirty --ghc-options=-fforce-recomp --ghc-options=-Werror
diff --git a/.github/workflows/binaries-windows-x64.yml b/.github/workflows/binaries-windows-x64.yml
index e60351bcd..2dd317575 100644
--- a/.github/workflows/binaries-windows-x64.yml
+++ b/.github/workflows/binaries-windows-x64.yml
@@ -123,7 +123,9 @@ jobs:
         ./stack --no-terminal build --test --only-dependencies --dry-run
         ./stack --no-terminal build --test --only-dependencies
 
-    # use whichever GHC is in default stack.yaml
+    - name: List dep versions
+      run: |
+        $stack exec -- ghc-pkg list
 
     - name: Build all hledger modules warning free, optimised and minimised
       run: |