diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 258fc871..6a5e9189 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,25 +18,23 @@ jobs:
       matrix:
         versions:
           - ghc: '8.6.5'
-            cabal: '3.4'
+            cabal: '3.14.2.0'
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
 
     # need to install older cabal/ghc versions from ppa repository
 
-    - name: Install recent cabal/ghc
-      uses: haskell/actions/setup@v1
+    - name: Install production GHC and recent cabal
+      uses: haskell-actions/setup@v2
       with:
         ghc-version: ${{ matrix.versions.ghc }}
         cabal-version: ${{ matrix.versions.cabal }}
 
     # declare/restore cached things
-    # caching doesn't work for scheduled runs yet
-    # https://github.com/actions/cache/issues/63
 
     - name: Cache cabal global package db
       id:   cabal-global
-      uses: actions/cache@v2
+      uses: actions/cache@v5
       with:
         path: |
           ~/.cabal
@@ -44,7 +42,7 @@ jobs:
 
     - name: Cache cabal work
       id:   cabal-local
-      uses: actions/cache@v2
+      uses: actions/cache@v5
       with:
         path: |
           dist-newstyle
@@ -56,7 +54,7 @@ jobs:
         cabal build all --dependencies-only --enable-tests --disable-optimization
     - name: Build
       run: |
-        cabal build all --enable-tests --disable-optimization 2>&1 | tee build.log
+        cabal build all --enable-tests --disable-optimization
     # - name: Test # needs GHCJS
     #   run: |
     #     cabal test all --disable-optimization
diff --git a/cabal.project b/cabal.project
new file mode 100644
index 00000000..b7768415
--- /dev/null
+++ b/cabal.project
@@ -0,0 +1,8 @@
+packages: */*.cabal
+
+source-repository-package
+    type: git
+    location: https://github.com/fmidue/ghcjs-base-stub.git
+    tag: e19317673d68c2be874fca4661d1ce16b2dc20a1
+
+with-compiler: ghc-8.6.5
diff --git a/codeworld-compiler/test/Main.hs b/codeworld-compiler/test/Main.hs
index 1e52c5ff..cd4d3eb5 100644
--- a/codeworld-compiler/test/Main.hs
+++ b/codeworld-compiler/test/Main.hs
@@ -43,7 +43,7 @@ compilerOutput testName =
       ErrorCheck
       ("test/testcases" </> testName </> "source.hs")
       (magicModuleFinder testName dir)
-      Nothing
+      (ExtraExtensions [] [])
       (dir </> "output.txt")
       buildMode
       False