diff --git a/.github/workflows/ci-mac-win.yml b/.github/workflows/ci-mac-win.yml
index e485226..7e2c251 100644
--- a/.github/workflows/ci-mac-win.yml
+++ b/.github/workflows/ci-mac-win.yml
@@ -21,11 +21,17 @@ jobs:
       fail-fast: false
       matrix:
         os:    [windows-latest, macos-latest]
-        ghc:   ['9.6', '9.4', '9.2', '8.0']
+        ghc:   ['9.6', '9.4', '9.2']
           # Minor versions are determined by setup-haskell.
           # Use quotes so that the version numbers are not interpreted as floats.
-          # GHC 7.10.3 is broken on Windows (Chocolatey)
-        cabal: [latest]
+        include:
+        - os: macos-latest
+          ghc: '7.10'
+        - os: windows-latest
+          ghc: '8.4'
+          # 2022-05-26: GHC 7.10.3 is broken on Windows (Chocolatey)
+          # 2023-02-10: GHCs 8.0 and 8.2 fail to build hsc2hs-0.68.10 on Windows
+          #   see https://github.com/haskell/hsc2hs/issues/81
 
     steps:
     - uses: actions/checkout@v4
@@ -34,7 +40,7 @@ jobs:
       id: setup-haskell
       with:
         ghc-version:   ${{ matrix.ghc }}
-        cabal-version: ${{ matrix.cabal }}
+        cabal-version: latest
         cabal-update:  true
 
     # # How would you get something like steps.setup-haskell.outputs.cabal-store
diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index b9edea2..638aa49 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -8,9 +8,9 @@
 #
 # For more information, see https://github.com/andreasabel/haskell-ci
 #
-# version: 0.17.20230911
+# version: 0.17.20230928
 #
-# REGENDATA ("0.17.20230911",["github","MissingH.cabal"])
+# REGENDATA ("0.17.20230928",["github","MissingH.cabal"])
 #
 name: Haskell-CI
 on:
@@ -32,14 +32,14 @@ jobs:
     strategy:
       matrix:
         include:
-          - compiler: ghc-9.8.0.20230822
+          - compiler: ghc-9.8.0.20230919
             compilerKind: ghc
-            compilerVersion: 9.8.0.20230822
+            compilerVersion: 9.8.0.20230919
             setup-method: ghcup
             allow-failure: true
-          - compiler: ghc-9.6.2
+          - compiler: ghc-9.6.3
             compilerKind: ghc
-            compilerVersion: 9.6.2
+            compilerVersion: 9.6.3
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.4.7
@@ -237,6 +237,7 @@ jobs:
           if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "package MissingH" >> cabal.project ; fi
           if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "    ghc-options: -Werror=missing-methods" >> cabal.project ; fi
           cat >> cabal.project <<EOF
+          allow-newer: containers
           EOF
           if $HEADHACKAGE; then
           echo "allow-newer: $($HCPKG list --simple-output | sed -E 's/([a-zA-Z-]+)-[0-9.]+/*:\1,/g')" >> cabal.project
@@ -278,6 +279,16 @@ jobs:
         run: |
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+      - name: prepare for constraint sets
+        run: |
+          rm -f cabal.project.local
+      - name: constraint set containers-0.7
+        run: |
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --enable-tests --disable-benchmarks --constraint='containers ^>= 0.7' all --dry-run ; fi
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then cabal-plan topo | sort ; fi
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --enable-tests --disable-benchmarks --constraint='containers ^>= 0.7' --dependencies-only -j2 all ; fi
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --enable-tests --disable-benchmarks --constraint='containers ^>= 0.7' all ; fi
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then $CABAL v2-test $ARG_COMPILER --enable-tests --disable-benchmarks --constraint='containers ^>= 0.7' all ; fi
       - name: save cache
         uses: actions/cache/save@v3
         if: always()
diff --git a/MissingH.cabal b/MissingH.cabal
index d8d2b92..1bcfac1 100644
--- a/MissingH.cabal
+++ b/MissingH.cabal
@@ -1,6 +1,7 @@
 cabal-version: 1.12
 name: MissingH
 version: 1.6.0.1
+x-revision: 1
 
 build-type: Simple
 license: BSD3
@@ -11,7 +12,7 @@ license-file: LICENSE
 
 tested-with:
   GHC == 9.8.0
-  GHC == 9.6.2
+  GHC == 9.6.3
   GHC == 9.4.7
   GHC == 9.2.8
   GHC == 9.0.2
@@ -126,7 +127,7 @@ library
   build-depends:
       array               >= 0.4.0.0 && < 0.6
     , base                >= 4.8.0.0 && < 5
-    , containers          >= 0.4.2.1 && < 0.7
+    , containers          >= 0.4.2.1 && < 0.8
     , directory           >= 1.1.0.2 && < 1.4
     , filepath            >= 1.3.0.0 && < 1.5
     , hslogger            >= 1.3.0.0 && < 1.4
diff --git a/cabal.haskell-ci b/cabal.haskell-ci
index e1f1b77..d032193 100644
--- a/cabal.haskell-ci
+++ b/cabal.haskell-ci
@@ -1 +1,11 @@
 branches: master
+installed: +all
+
+constraint-set containers-0.7
+  ghc: >= 8.2
+  constraints: containers ^>= 0.7
+  tests: True
+  run-tests: True
+
+raw-project
+  allow-newer: containers
\ No newline at end of file