Drop cabal-experimental input (#228)

* Drop cabal-experimental input, use regular cabal for all shells

The cabal-experimental input (stable-haskell/cabal cross-compile branch)
was used for withGHCTooling shells. The pinned version (Apr 2025) has
hackage-security bounds incompatible with GHC 9.10+/9.12+ (ghc-prim
>= 0.12), causing IFD plan resolution failures. The newer version
(Aug 2025) fixes that but regresses shared library handling, breaking
downstream CI.

Simplify by using the regular cabal input for all shell variants.

* Update haskell.nix to fix head.hackage FOD hash mismatch

The head.hackage upstream content changed after Feb 21, making the
fixed-output derivation hash stale. With the cached outputs GC'd,
all JS backend IFD evaluations fail with hash mismatch, blocking
the entire Hydra eval (no jobsetevals entry produced).

Update haskell.nix from 7e7550c (Dec 9 2025) to cc939d0 (Feb 23 2026)
which includes the daily "Update Hackage and Stackage" with the
current head.hackage hash.

* Update head.hackage FOD hash and haskell.nix input

The head.hackage upstream content changed (upstream index grew),
making the fixed-output derivation hash in tool-map.nix stale.
With the cached outputs GC'd from hydra builders, all JS backend
IFD evaluations fail with hash mismatch, blocking the entire
Hydra eval (no jobsetevals produced).

Update the head.hackage sha256 from
  sha256-AO/vHIMSIBwjbp5GY561SmnPr5qTTyBt9ruy8D3lKZI=
to
  sha256-nFFut7+8NzUps+4MsmnAo2bLp1EE2Dx4eWqTeZ2aYqI=

Also update haskell.nix from 7e7550c (Dec 2025) to cc939d0
(Feb 23 2026) to pick up latest Hackage/Stackage indexes.

Author: angerman

dynamic.nix

@@ -1,6 +1,6 @@
 # define a development shell for dynamically linked applications (default)
 { self, pkgs, compiler, compiler-nix-name, toolsModule, withHLS ? true, withHlint ? true, withIOG ? true, withIOGFull ? false, withGHCTooling ? false }:
-let tool-version-map = (import ./tool-map.nix) (self // { inputs = self.inputs // {cabal = if withGHCTooling then self.inputs.cabal-experimental else self.inputs.cabal;}; });
+let tool-version-map = (import ./tool-map.nix) self;
     tool = tool-name: pkgs.pkgsBuildBuild.haskell-nix.tool compiler-nix-name tool-name [(tool-version-map compiler-nix-name tool-name) toolsModule];
     cabal-install = tool "cabal";
     haskell-tools =

flake.lock

@@ -7,8 +7,6 @@
     inputs.iohk-nix.url = "github:input-output-hk/iohk-nix";
     inputs.cabal.url = "github:stable-haskell/cabal";
     inputs.cabal.flake = false;
-    inputs.cabal-experimental.url = "github:stable-haskell/cabal?ref=stable-haskell/feature/cross-compile";
-    inputs.cabal-experimental.flake = false;
 
     outputs = { self, nixpkgs, flake-utils, haskellNix, iohk-nix, ... }:
     let overlays = {

flake.nix

@@ -15,7 +15,7 @@ let
              f76d08be13e9a61a377a85e2fb63f4c5435d40f8feb3e12eb05905edb8cdea89
              26021a13b401500c8eb2761ca95c61f2d625bfef951b939a8124ed12ecf07329
              7541f32a4ccca4f97aea3b22f5e593ba2c0267546016b992dfadcd2fe944e55d
-          --sha256: sha256-AO/vHIMSIBwjbp5GY561SmnPr5qTTyBt9ruy8D3lKZI=
+          --sha256: sha256-nFFut7+8NzUps+4MsmnAo2bLp1EE2Dx4eWqTeZ2aYqI=
 
         if impl(ghc < 9.13)
           active-repositories: hackage.haskell.org