diff --git a/.github/workflows/binaries-linux-x64.yml b/.github/workflows/binaries-linux-x64.yml
index fca8abf27..9b2c8ec0e 100644
--- a/.github/workflows/binaries-linux-x64.yml
+++ b/.github/workflows/binaries-linux-x64.yml
@@ -16,7 +16,7 @@ jobs:
 
     env:
       stack: stack
-      ghc:   9.12.2
+      ghcid: 9.12.2
 
     steps:
 
@@ -37,18 +37,18 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ~/.ghcup
-        key: ${{ runner.os }}-x64-ghcup-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-ghcup-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-ghcup-${{ env.ghc }}
+             ${{ runner.os }}-x64-ghcup-${{ env.ghcid }}
 
     - name: Cache - ~/.cabal
       id:   cabal
       uses: actions/cache@v4
       with:
         path: ~/.cabal
-        key: ${{ runner.os }}-x64-cabal-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-cabal-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-cabal-${{ env.ghc }}
+             ${{ runner.os }}-x64-cabal-${{ env.ghcid }}
 
     # actions:
 
diff --git a/.github/workflows/binaries-mac-arm64.yml b/.github/workflows/binaries-mac-arm64.yml
index 001c36680..32bdde451 100644
--- a/.github/workflows/binaries-mac-arm64.yml
+++ b/.github/workflows/binaries-mac-arm64.yml
@@ -15,7 +15,7 @@ jobs:
 
     env:
       stack: stack
-      ghc:   9.12.2
+      ghcid: 9.12.2
 
     steps:
 
@@ -41,58 +41,58 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ~/.local/bin
-        key: ${{ runner.os }}-arm64-stack-programs-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-arm64-stack-programs-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-arm64-stack-programs-${{ env.ghc }}
+             ${{ runner.os }}-arm64-stack-programs-${{ env.ghcid }}
 
     - name: Cache - ~/.stack
       id:   stack-global
       uses: actions/cache@v4
       with:
         path: ~/.stack
-        key: ${{ runner.os }}-arm64-stack-global-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-arm64-stack-global-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-arm64-stack-global-${{ env.ghc }}
+             ${{ runner.os }}-arm64-stack-global-${{ env.ghcid }}
 
     - name: Cache - ./.stack-work
       uses: actions/cache@v4
       with:
         path: .stack-work
-        key: ${{ runner.os }}-arm64-stack-work-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-arm64-stack-work-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-arm64-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-arm64-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-lib/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-lib/.stack-work
-        key: ${{ runner.os }}-arm64-hledger-lib-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-lib/package.yaml') }}
+        key: ${{ runner.os }}-arm64-hledger-lib-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-lib/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-arm64-hledger-lib-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-arm64-hledger-lib-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger/.stack-work
-        key: ${{ runner.os }}-arm64-hledger-stack-work-${{ env.ghc }}-${{ hashFiles('hledger/package.yaml') }}
+        key: ${{ runner.os }}-arm64-hledger-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-arm64-hledger-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-arm64-hledger-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-ui/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-ui/.stack-work
-        key: ${{ runner.os }}-arm64-hledger-ui-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-ui/package.yaml') }}
+        key: ${{ runner.os }}-arm64-hledger-ui-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-ui/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-arm64-hledger-ui-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-arm64-hledger-ui-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-web/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-web/.stack-work
-        key: ${{ runner.os }}-arm64-hledger-web-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-web/package.yaml') }}
+        key: ${{ runner.os }}-arm64-hledger-web-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-web/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-arm64-hledger-web-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-arm64-hledger-web-stack-work-${{ env.ghcid }}
 
     # actions:
 
diff --git a/.github/workflows/binaries-mac-x64.yml b/.github/workflows/binaries-mac-x64.yml
index 61c802744..baf38d33b 100644
--- a/.github/workflows/binaries-mac-x64.yml
+++ b/.github/workflows/binaries-mac-x64.yml
@@ -15,7 +15,7 @@ jobs:
 
     env:
       stack: stack
-      ghc:   9.12.2
+      ghcid: 9.12.2
 
     steps:
 
@@ -41,58 +41,58 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ~/.local/bin
-        key: ${{ runner.os }}-x64-stack-programs-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-programs-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-programs-${{ env.ghc }}
+             ${{ runner.os }}-x64-stack-programs-${{ env.ghcid }}
 
     - name: Cache - ~/.stack
       id:   stack-global
       uses: actions/cache@v4
       with:
         path: ~/.stack
-        key: ${{ runner.os }}-x64-stack-global-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-global-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-global-${{ env.ghc }}
+             ${{ runner.os }}-x64-stack-global-${{ env.ghcid }}
 
     - name: Cache - ./.stack-work
       uses: actions/cache@v4
       with:
         path: .stack-work
-        key: ${{ runner.os }}-x64-stack-work-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-lib/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-lib/.stack-work
-        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-lib/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-lib/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger/.stack-work
-        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}-${{ hashFiles('hledger/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-ui/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-ui/.stack-work
-        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-ui/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-ui/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-web/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-web/.stack-work
-        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-web/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-web/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}
 
     # actions:
 
diff --git a/.github/workflows/binaries-windows-x64.yml b/.github/workflows/binaries-windows-x64.yml
index 1cccae3c5..b30d4477e 100644
--- a/.github/workflows/binaries-windows-x64.yml
+++ b/.github/workflows/binaries-windows-x64.yml
@@ -20,7 +20,7 @@ jobs:
     env:
       # use preinstalled ghc 9.12.2
       stack: stack --system-ghc --no-install-ghc --stack-yaml stack.yaml
-      ghc:   9.12.2
+      ghcid: 9.12.2
 
     steps:
 
@@ -49,49 +49,49 @@ jobs:
       uses: actions/cache@v4
       with:
         path: C:\Users\runneradmin\AppData\Roaming\stack\
-        key: ${{ runner.os }}-x64-appdata-roaming-stack-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-appdata-roaming-stack-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-appdata-roaming-stack-${{ env.ghc }}
+             ${{ runner.os }}-x64-appdata-roaming-stack-${{ env.ghcid }}
 
     - name: Cache - ./.stack-work
       uses: actions/cache@v4
       with:
         path: .stack-work
-        key: ${{ runner.os }}-x64-stack-work-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-lib/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-lib/.stack-work
-        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-lib/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-lib/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger/.stack-work
-        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}-${{ hashFiles('hledger/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-ui/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-ui/.stack-work
-        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-ui/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-ui/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-web/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-web/.stack-work
-        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-web/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-web/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}
 
     # actions
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a5b2882f4..92dc03273 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
 
     env:
       stack:     stack
-      ghc:       9.10.1
+      ghcid:       9.10.1
       cachedate: 20250615   # bump this when new caches are needed
 
       # flag for skipping later steps, declared here to prevent "Context access might be invalid" warnings
@@ -151,9 +151,9 @@ jobs:
         # XXX if stack.yaml is a symlink, this fails with
         #  Error: The template is not valid. .github/workflows/push.yml (Line: 103, Col: 14): hashFiles('**.yaml') failed.
         #  Fail to hash files under directory '/home/runner/work/hledger/hledger'
-        key: ${{ runner.os }}-x64-stack-global-${{ env.ghc }}-${{ env.cachedate }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-global-${{ env.ghcid }}-${{ env.cachedate }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-global-${{ env.ghc }}-${{ env.cachedate }}
+             ${{ runner.os }}-x64-stack-global-${{ env.ghcid }}-${{ env.cachedate }}
       if: env.do-all
 
     - name: Cache - stack-installed programs in ~/.local/bin
@@ -161,54 +161,54 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ~/.local/bin
-        key: ${{ runner.os }}-x64-stack-programs-${{ env.ghc }}-${{ env.cachedate }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-programs-${{ env.ghcid }}-${{ env.cachedate }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-programs-${{ env.ghc }}-${{ env.cachedate }}
+             ${{ runner.os }}-x64-stack-programs-${{ env.ghcid }}-${{ env.cachedate }}
       if: env.do-all
 
     - name: Cache - .stack-work
       uses: actions/cache@v4
       with:
         path: .stack-work
-        key: ${{ runner.os }}-x64-stack-work-${{ env.ghc }}-${{ env.cachedate }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}-${{ env.cachedate }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-work-${{ env.ghc }}-${{ env.cachedate }}
+             ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}-${{ env.cachedate }}
       if: env.do-all
 
     - name: Cache - hledger-lib/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-lib/.stack-work
-        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}-${{ env.cachedate }}-${{ hashFiles('hledger-lib/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}-${{ env.cachedate }}-${{ hashFiles('hledger-lib/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}-${{ env.cachedate }}
+             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}-${{ env.cachedate }}
       if: env.do-all
 
     - name: Cache - hledger/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger/.stack-work
-        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}-${{ env.cachedate }}-${{ hashFiles('hledger/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}-${{ env.cachedate }}-${{ hashFiles('hledger/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}-${{ env.cachedate }}
+             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}-${{ env.cachedate }}
       if: env.do-all
 
     - name: Cache - hledger-ui/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-ui/.stack-work
-        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}-${{ env.cachedate }}-${{ hashFiles('hledger-ui/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}-${{ env.cachedate }}-${{ hashFiles('hledger-ui/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}-${{ env.cachedate }}
+             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}-${{ env.cachedate }}
       if: env.do-all
 
     - name: Cache - hledger-web/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-web/.stack-work
-        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}-${{ env.cachedate }}-${{ hashFiles('hledger-web/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}-${{ env.cachedate }}-${{ hashFiles('hledger-web/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}-${{ env.cachedate }}
+             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}-${{ env.cachedate }}
       if: env.do-all
 
     # Ensure the ghc version we need is installed.
diff --git a/.github/workflows/oldest.yml b/.github/workflows/oldest.yml
index 006c32a84..edf164816 100644
--- a/.github/workflows/oldest.yml
+++ b/.github/workflows/oldest.yml
@@ -18,7 +18,7 @@ jobs:
 
     env:
       stack: stack --stack-yaml=stack96.yaml
-      ghc:   9.6.6
+      ghcid:   9.6.6
 
     steps:
 
@@ -39,58 +39,58 @@ jobs:
         # XXX if stack.yaml is a symlink, this fails with
         #  Error: The template is not valid. .github/workflows/push.yml (Line: 103, Col: 14): hashFiles('**.yaml') failed.
         #  Fail to hash files under directory '/home/runner/work/hledger/hledger'
-        key: ${{ runner.os }}-x64-stack-global-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-global-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-global-${{ env.ghc }}
+             ${{ runner.os }}-x64-stack-global-${{ env.ghcid }}
 
     - name: Cache - stack-installed programs in ~/.local/bin
       id:   stack-programs
       uses: actions/cache@v4
       with:
         path: ~/.local/bin
-        key: ${{ runner.os }}-x64-stack-programs-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-programs-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-programs-${{ env.ghc }}
+             ${{ runner.os }}-x64-stack-programs-${{ env.ghcid }}
 
     - name: Cache - .stack-work
       uses: actions/cache@v4
       with:
         path: .stack-work
-        key: ${{ runner.os }}-x64-stack-work-${{ env.ghc }}-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-lib/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-lib/.stack-work
-        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-lib/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-lib/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-lib-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger/.stack-work
-        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}-${{ hashFiles('hledger/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-ui/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-ui/.stack-work
-        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-ui/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-ui/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-ui-stack-work-${{ env.ghcid }}
 
     - name: Cache - hledger-web/.stack-work
       uses: actions/cache@v4
       with:
         path: hledger-web/.stack-work
-        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}-${{ hashFiles('hledger-web/package.yaml') }}
+        key: ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}-${{ hashFiles('hledger-web/package.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghc }}
+             ${{ runner.os }}-x64-hledger-web-stack-work-${{ env.ghcid }}
 
 
     # ACTIONS