--- zlib-0.7.1.0/zlib.cabal	2001-09-09 03:46:40.000000000 +0200
+++ zlib-0.7.1.0.new/zlib.cabal	2024-12-26 12:56:49.146757178 +0100
@@ -84,7 +84,7 @@
   other-extensions: DeriveGeneric
   other-extensions: CApiFFI
 
-  build-depends:   base >= 4.9 && < 4.21,
+  build-depends:   base >= 4.9 && < 4.22,
                    bytestring >= 0.9 && < 0.13
 
   build-tools:     hsc2hs >= 0.67 && < 0.69