darcs: apply patches for base 4.20, Cabal 3.12 and hashable 1.5

pkgs/development/haskell-modules/configuration-common.nix

@@ -2414,6 +2414,15 @@ with haskellLib;
         } super.regex-compat-tdfa
       );
 
+  darcs = appendPatches [
+    # Cabal 3.12 support in Setup.hs
+    # https://hub.darcs.net/darcs/darcs-reviewed/patch/50d9b0b402a896c83aa7929a50a0e0449838600f
+    ./patches/darcs-cabal-3.12.patch
+    # GHC 9.10 patch plus lifted constraints for hashable
+    # https://hub.darcs.net/darcs/darcs-reviewed/patch/32646b190e019de21a103e950c4eccdd66f7eadc
+    ./patches/darcs-stackage-lts-23.patch
+  ] super.darcs;
+
   # 2025-02-11: Too strict bounds on hedgehog < 1.5, hspec-hedgehog < 0.2
   validation-selective = doJailbreak super.validation-selective;
 

pkgs/development/haskell-modules/patches/darcs-cabal-3.12.patch

@@ -0,0 +1,24 @@
+diff -rN -u old-darcs.net/darcs.cabal new-darcs.net/darcs.cabal
+--- old-darcs.net/darcs.cabal	2025-09-13 02:45:32.790227974 +0200
++++ new-darcs.net/darcs.cabal	2025-09-13 02:45:32.791227985 +0200
+@@ -124,7 +124,7 @@
+ 
+ custom-setup
+     setup-depends: base      >= 4.10 && < 4.20,
+-                   Cabal     >= 2.4 && < 3.11,
++                   Cabal     >= 2.4 && < 3.13,
+                    process   >= 1.2.3.0 && < 1.7,
+                    filepath  >= 1.4.1 && < 1.5.0.0,
+                    directory >= 1.2.7 && < 1.4
+diff -rN -u old-darcs.net/Setup.hs new-darcs.net/Setup.hs
+--- old-darcs.net/Setup.hs	2025-09-13 02:45:32.789227964 +0200
++++ new-darcs.net/Setup.hs	2025-09-13 02:45:32.790227974 +0200
+@@ -8,7 +8,7 @@
+ import Distribution.Package ( packageVersion )
+ import Distribution.Version( Version )
+ import Distribution.Simple.LocalBuildInfo
+-         ( LocalBuildInfo(..), absoluteInstallDirs )
++         ( LocalBuildInfo(..), absoluteInstallDirs, buildDir )
+ import Distribution.Simple.InstallDirs (mandir, CopyDest (NoCopyDest))
+ import Distribution.Simple.Setup
+     (buildVerbosity, copyDest, copyVerbosity, fromFlag,

pkgs/development/haskell-modules/patches/darcs-stackage-lts-23.patch

@@ -0,0 +1,32 @@
+diff -rN -u old-darcs.net/darcs.cabal new-darcs.net/darcs.cabal
+--- old-darcs.net/darcs.cabal	2025-09-13 02:46:05.662572580 +0200
++++ new-darcs.net/darcs.cabal	2025-09-13 02:46:05.748573468 +0200
+@@ -123,7 +123,7 @@
+ -- ----------------------------------------------------------------------
+ 
+ custom-setup
+-    setup-depends: base      >= 4.10 && < 4.20,
++    setup-depends: base      >= 4.10 && < 4.21,
+                    Cabal     >= 2.4 && < 3.13,
+                    process   >= 1.2.3.0 && < 1.7,
+                    filepath  >= 1.4.1 && < 1.5.0.0,
+@@ -412,7 +412,7 @@
+     else
+       build-depends:  unix >= 2.7.1.0 && < 2.9
+ 
+-    build-depends:    base              >= 4.10 && < 4.20,
++    build-depends:    base              >= 4.10 && < 4.21,
+                       safe              >= 0.3.20 && < 0.4,
+                       stm               >= 2.1 && < 2.6,
+                       binary            >= 0.5 && < 0.11,
+@@ -447,7 +447,7 @@
+                       temporary         >= 1.2.1 && < 1.4,
+                       process           >= 1.2.3.0 && < 1.7,
+                       array             >= 0.5.1.0 && < 0.6,
+-                      hashable          >= 1.2.3.3 && < 1.5,
++                      hashable          >= 1.2.3.3 && < 1.6,
+                       mmap              >= 0.5.9 && < 0.6,
+                       zlib              >= 0.6.1.2 && < 0.8,
+                       network-uri       >= 2.6 && < 2.8,
+ 
+