diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 8038594714..f94895cd42 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -8,9 +8,9 @@
 #
 # For more information, see https://github.com/haskell-CI/haskell-ci
 #
-# version: 0.19.20250506
+# version: 0.19.20260209
 #
-# REGENDATA ("0.19.20250506",["github","--no-cabal-check","agda-stdlib-utils.cabal"])
+# REGENDATA ("0.19.20260209",["github","--no-cabal-check","agda-stdlib-utils.cabal"])
 #
 name: Haskell-CI
 on:
@@ -22,6 +22,12 @@ on:
     branches:
       - master
       - experimental
+  merge_group:
+    branches:
+      - master
+      - experimental
+  workflow_dispatch:
+    {}
 jobs:
   linux:
     name: Haskell-CI - Linux - ${{ matrix.compiler }}
@@ -34,14 +40,19 @@ jobs:
     strategy:
       matrix:
         include:
-          - compiler: ghc-9.12.2
+          - compiler: ghc-9.14.1
+            compilerKind: ghc
+            compilerVersion: 9.14.1
+            setup-method: ghcup
+            allow-failure: false
+          - compiler: ghc-9.12.4
             compilerKind: ghc
-            compilerVersion: 9.12.2
+            compilerVersion: 9.12.4
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-9.10.2
+          - compiler: ghc-9.10.3
             compilerKind: ghc
-            compilerVersion: 9.10.2
+            compilerVersion: 9.10.3
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.8.4
@@ -97,8 +108,8 @@ jobs:
           chmod a+x "$HOME/.ghcup/bin/ghcup"
       - name: Install cabal-install
         run: |
-          "$HOME/.ghcup/bin/ghcup" install cabal 3.14.2.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
-          echo "CABAL=$HOME/.ghcup/bin/cabal-3.14.2.0 -vnormal+nowrap" >> "$GITHUB_ENV"
+          "$HOME/.ghcup/bin/ghcup" install cabal 3.16.0.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
+          echo "CABAL=$HOME/.ghcup/bin/cabal-3.16.0.0 -vnormal+nowrap" >> "$GITHUB_ENV"
       - name: Install GHC (GHCup)
         if: matrix.setup-method == 'ghcup'
         run: |
@@ -174,7 +185,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -199,7 +210,11 @@ jobs:
           touch cabal.project.local
           echo "packages: ${PKGDIR_agda_stdlib_utils}" >> cabal.project
           echo "package agda-stdlib-utils" >> cabal.project
-          echo "    ghc-options: -Werror=missing-methods" >> cabal.project
+          echo "    ghc-options: -Werror=missing-methods -Werror=missing-fields" >> cabal.project
+          if [ $((HCNUMVER >= 90400)) -ne 0 ] ; then echo "package agda-stdlib-utils" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 90400)) -ne 0 ] ; then echo "    ghc-options: -Werror=unused-packages" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then echo "package agda-stdlib-utils" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then echo "    ghc-options: -Werror=incomplete-patterns -Werror=incomplete-uni-patterns" >> cabal.project ; fi
           cat >> cabal.project <<EOF
           EOF
           $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(agda-stdlib-utils)$/; }' >> cabal.project.local
@@ -210,7 +225,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v4
+        uses: actions/cache/restore@v5
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -234,7 +249,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
         if: always()
-        uses: actions/cache/save@v4
+        uses: actions/cache/save@v5
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
diff --git a/agda-stdlib-utils.cabal b/agda-stdlib-utils.cabal
index 2e4b0854b4..fcec7db2dd 100644
--- a/agda-stdlib-utils.cabal
+++ b/agda-stdlib-utils.cabal
@@ -6,8 +6,9 @@ description:     Helper programs for setting up the Agda standard library.
 license:         MIT
 
 tested-with:
-  GHC == 9.12.2
-  GHC == 9.10.2
+  GHC == 9.14.1
+  GHC == 9.12.4
+  GHC == 9.10.3
   GHC == 9.8.4
   GHC == 9.6.7
   GHC == 9.4.8
@@ -25,7 +26,7 @@ common common-build-parameters
     PatternSynonyms
 
   build-depends:
-      base          >= 4.12.0.0 && < 4.22
+      base          >= 4.12.0.0 && < 4.23
     , filemanip     >= 0.3.6.2  && < 0.4
 
 executable GenerateEverything