diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 0315094..01b866a 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: 0.19.20240429
+# version: 0.19.20240517
 #
-# REGENDATA ("0.19.20240429",["github","safecopy.cabal"])
+# REGENDATA ("0.19.20240517",["github","safecopy.cabal"])
 #
 name: Haskell-CI
 on:
@@ -32,9 +32,9 @@ jobs:
     strategy:
       matrix:
         include:
-          - compiler: ghc-9.10.0.20240426
+          - compiler: ghc-9.10.1
             compilerKind: ghc
-            compilerVersion: 9.10.0.20240426
+            compilerVersion: 9.10.1
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.8.2
@@ -101,7 +101,6 @@ jobs:
           mkdir -p "$HOME/.ghcup/bin"
           curl -sL https://downloads.haskell.org/ghcup/0.1.20.0/x86_64-linux-ghcup-0.1.20.0 > "$HOME/.ghcup/bin/ghcup"
           chmod a+x "$HOME/.ghcup/bin/ghcup"
-          "$HOME/.ghcup/bin/ghcup" config add-release-channel https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-prereleases-0.0.8.yaml;
           "$HOME/.ghcup/bin/ghcup" install ghc "$HCVER" || (cat "$HOME"/.ghcup/logs/*.* && false)
           "$HOME/.ghcup/bin/ghcup" install cabal 3.10.3.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
         env:
@@ -126,7 +125,7 @@ jobs:
           echo "HCNUMVER=$HCNUMVER" >> "$GITHUB_ENV"
           echo "ARG_TESTS=--enable-tests" >> "$GITHUB_ENV"
           echo "ARG_BENCH=--enable-benchmarks" >> "$GITHUB_ENV"
-          if [ $((HCNUMVER >= 91000)) -ne 0 ] ; then echo "HEADHACKAGE=true" >> "$GITHUB_ENV" ; else echo "HEADHACKAGE=false" >> "$GITHUB_ENV" ; fi
+          echo "HEADHACKAGE=false" >> "$GITHUB_ENV"
           echo "ARG_COMPILER=--$HCKIND --with-compiler=$HC" >> "$GITHUB_ENV"
           echo "GHCJSARITH=0" >> "$GITHUB_ENV"
         env:
@@ -155,18 +154,6 @@ jobs:
           repository hackage.haskell.org
             url: http://hackage.haskell.org/
           EOF
-          if $HEADHACKAGE; then
-          cat >> $CABAL_CONFIG <<EOF
-          repository head.hackage.ghc.haskell.org
-             url: https://ghc.gitlab.haskell.org/head.hackage/
-             secure: True
-             root-keys: 7541f32a4ccca4f97aea3b22f5e593ba2c0267546016b992dfadcd2fe944e55d
-                        26021a13b401500c8eb2761ca95c61f2d625bfef951b939a8124ed12ecf07329
-                        f76d08be13e9a61a377a85e2fb63f4c5435d40f8feb3e12eb05905edb8cdea89
-             key-threshold: 3
-          active-repositories: hackage.haskell.org, head.hackage.ghc.haskell.org:override
-          EOF
-          fi
           cat >> $CABAL_CONFIG <<EOF
           program-default-options
             ghc-options: $GHCJOBS +RTS -M3G -RTS
@@ -219,10 +206,7 @@ jobs:
           cat >> cabal.project <<EOF
           allow-newer: lens
           EOF
-          if $HEADHACKAGE; then
-          echo "allow-newer: $($HCPKG list --simple-output | sed -E 's/([a-zA-Z-]+)-[0-9.]+/*:\1,/g')" >> cabal.project
-          fi
-          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(safecopy)$/; }' >> cabal.project.local
+          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(safecopy)$/; }' >> cabal.project.local
           cat cabal.project
           cat cabal.project.local
       - name: dump install plan
diff --git a/safecopy.cabal b/safecopy.cabal
index 6147bf6..7c0e38d 100644
--- a/safecopy.cabal
+++ b/safecopy.cabal
@@ -1,6 +1,6 @@
 Name:                safecopy
 Version:             0.10.4.2
-x-revision:          8
+x-revision:          10
 Synopsis:            Binary serialization with version control.
 Description:         An extension to Data.Serialize with built-in version control.
 Homepage:            https://github.com/acid-state/safecopy
@@ -14,7 +14,7 @@ Extra-source-files: CHANGELOG.md
 Cabal-version:       >=1.10
 
 tested-with:
-  GHC == 9.10.0
+  GHC == 9.10.1
   GHC == 9.8.2
   GHC == 9.6.5
   GHC == 9.4.8
@@ -74,6 +74,7 @@ Test-suite instances
                        lens-action
                      , tasty
                      , tasty-quickcheck
+                     , quickcheck-instances
                      , QuickCheck >= 2.8.2 && < 3
 
 Test-suite generic