diff --git a/.github/workflows/build-all-versions.yml b/.github/workflows/build-all-versions.yml
index 2bd856b7c..0f3222809 100644
--- a/.github/workflows/build-all-versions.yml
+++ b/.github/workflows/build-all-versions.yml
@@ -12,6 +12,7 @@ jobs:
     name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         cabal: ["latest"]
@@ -19,21 +20,26 @@ jobs:
           - "8.6.5"
           - "8.8.3"
           - "8.10.7"
+          - "9.6.6"
         exclude:
           - os: macos-latest
             ghc: 8.8.3
           - os: macos-latest
             ghc: 8.6.5
+          - os: macos-latest
+            ghc: 8.10.7
           - os: windows-latest
             ghc: 8.8.3
           - os: windows-latest
             ghc: 8.6.5
+          - os: windows-latest
+            ghc: 8.10.7
 
     steps:
     - uses: actions/checkout@v2
       if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
 
-    - uses: haskell/actions/setup@v2
+    - uses: haskell-actions/setup@v2
       id: setup-haskell-cabal
       name: Setup Haskell
       with:
@@ -44,7 +50,7 @@ jobs:
       run: |
         cabal freeze
 
-    - uses: actions/cache@v1
+    - uses: actions/cache@v4
       name: Cache ~/.cabal/store
       with:
         path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
@@ -66,14 +72,13 @@ jobs:
     strategy:
       matrix:
         stack: ["latest"]
-        ghc: ["7.10.3","8.0.2", "8.2.2", "8.4.4", "8.6.5", "8.8.4", "8.10.7", "9.0.2"]
-        # ghc: ["8.8.3"]
+        ghc: ["8.4.4", "8.6.5", "8.8.4", "8.10.7", "9.0.2", "9.6.6"]
 
     steps:
     - uses: actions/checkout@v2
       if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
 
-    - uses: haskell/actions/setup@v2
+    - uses: haskell-actions/setup@v2
       name: Setup Haskell Stack
       with:
         ghc-version: ${{ matrix.ghc }}
@@ -85,7 +90,7 @@ jobs:
     - run: sed -i.bak 's/"C compiler link flags", "/&-no-pie /' /home/runner/.ghcup/ghc/7.10.3/lib/ghc-7.10.3/settings
       if: matrix.ghc == '7.10.3'
 
-    - uses: actions/cache@v1
+    - uses: actions/cache@v4
       name: Cache ~/.stack
       with:
         path: ~/.stack
diff --git a/gf.cabal b/gf.cabal
index 4b7e25a2d..ce0682d46 100644
--- a/gf.cabal
+++ b/gf.cabal
@@ -73,7 +73,7 @@ library
   build-depends:
     -- GHC 8.0.2 to GHC 8.10.4
     array >= 0.5.1 && < 0.6,
-    base >= 4.9.1 && < 4.19 ,
+    base >= 4.9.1 && < 4.22,
     bytestring >= 0.10.8 && < 0.12,
     containers >= 0.5.7 && < 0.7,
     exceptions >= 0.8.3 && < 0.11,
@@ -398,7 +398,7 @@ test-suite gf-tests
   main-is: run.hs
   hs-source-dirs: testsuite
   build-depends:
-    base >= 4.9.1 && < 4.16,
+    base >= 4.9.1,
     Cabal >= 1.8,
     directory >= 1.3.0 && < 1.4,
     filepath >= 1.4.1 && < 1.5,
diff --git a/src/runtime/c/configure.ac b/src/runtime/c/configure.ac
index 2af669fe2..4e86e5251 100644
--- a/src/runtime/c/configure.ac
+++ b/src/runtime/c/configure.ac
@@ -30,6 +30,7 @@ AM_PROG_CC_C_O
  -Wall\
  -Wextra\
  -Wno-missing-field-initializers\
+ -fpermissive\
  -Wno-unused-parameter\
  -Wno-unused-value"
 fi]