diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index b6ff8c0..743fced 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -1,6 +1,6 @@
 # This GitHub workflow config has been generated by a script via
 #
-#   haskell-ci 'github' 'cabal.project'
+#   haskell-ci 'github' 'cabal.project' '--config' 'cabal.haskell-ci'
 #
 # To regenerate the script (for example after adjusting tested-with) run
 #
@@ -10,7 +10,7 @@
 #
 # version: 0.17.20240109
 #
-# REGENDATA ("0.17.20240109",["github","cabal.project"])
+# REGENDATA ("0.17.20240109",["github","cabal.project","--config","cabal.haskell-ci"])
 #
 name: Haskell-CI
 on:
@@ -48,6 +48,11 @@ jobs:
             compilerVersion: 9.2.8
             setup-method: ghcup
             allow-failure: false
+          - compiler: ghc-8.10.7
+            compilerKind: ghc
+            compilerVersion: 8.10.7
+            setup-method: ghcup
+            allow-failure: false
       fail-fast: false
     steps:
       - name: apt
@@ -165,9 +170,9 @@ jobs:
           source-repository-package
             type:     git
             location: https://github.com/FinleyMcIlwaine/bos-snappy
-            tag:      373be55746d8b3c75e6e8f0a4d1dfebf3e3ad649
+            tag:      b00b103a8c522aa3adde7e922537ab6b74f73eb0
           EOF
-          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(snappy-c)$/; }' >> cabal.project.local
+          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(bytestring|snappy-c)$/; }' >> cabal.project.local
           cat cabal.project
           cat cabal.project.local
       - name: dump install plan
diff --git a/cabal.haskell-ci b/cabal.haskell-ci
index a72faa1..af56460 100644
--- a/cabal.haskell-ci
+++ b/cabal.haskell-ci
@@ -1 +1,3 @@
 apt: libsnappy-dev
+
+installed: -bytestring
diff --git a/cabal.project b/cabal.project
index c4d42b8..a441f78 100644
--- a/cabal.project
+++ b/cabal.project
@@ -3,4 +3,4 @@ packages: .
 source-repository-package
   type: git
   location: https://github.com/FinleyMcIlwaine/bos-snappy
-  tag: 373be55746d8b3c75e6e8f0a4d1dfebf3e3ad649
+  tag: b00b103a8c522aa3adde7e922537ab6b74f73eb0
diff --git a/snappy-c.cabal b/snappy-c.cabal
index 469e1b5..848daa2 100644
--- a/snappy-c.cabal
+++ b/snappy-c.cabal
@@ -17,7 +17,8 @@ category:           Codec
 build-type:         Simple
 extra-source-files: README.md
 extra-doc-files:    CHANGELOG.md
-tested-with:        GHC==9.2.8
+tested-with:        GHC==8.10.7
+                  , GHC==9.2.8
                   , GHC==9.4.8
                   , GHC==9.6.4
                   , GHC==9.8.1
@@ -33,7 +34,7 @@ common lang
       -Wprepositive-qualified-module
       -Widentities
   build-depends:
-      base >= 4.16 && < 4.20
+      base >= 4.14 && < 4.20
   default-language:
       Haskell2010
   default-extensions:
@@ -101,7 +102,6 @@ executable snappy-cli
       -threaded
       -rtsopts
 
--- TODO bounds here
 test-suite test-snappy-c
   import:
       lang