Add nixpkgs-2511 (#2456)

* Add nixpkgs-2511

* Skip tests for GHC using older LLVM versions no longer in nispkgs

* Use NDK 27

* Skip android tests that require old LLVM versions

Author: hamishmack

ci.nix

@@ -18,7 +18,7 @@
 
   # short names for nixpkgs versions
   nixpkgsVersions = {
-    "R2505" = inputs.nixpkgs-2505;
+    "R2511" = inputs.nixpkgs-2511;
     "unstable" = inputs.nixpkgs-unstable;
   };
 
@@ -64,12 +64,10 @@
       # cabal-install and nix-tools plans.  When removing a ghc version
       # from here (so that is no longer cached) also remove ./materialized/ghcXXX.
       # Update supported-ghc-versions.md to reflect any changes made here.
-      nixpkgs.lib.optionalAttrs (builtins.elem nixpkgsName ["R2411" "R2505"]) {
+      nixpkgs.lib.optionalAttrs (builtins.elem nixpkgsName ["R2411" "R2505" "R2511"]) {
         ghc96 = false;
         ghc98 = false;
-        ghc98llvm = false;
         ghc910 = false;
-        ghc910llvm = false;
         ghc912 = false;
       } // nixpkgs.lib.optionalAttrs (nixpkgsName == "unstable") {
         ghc96 = true;
@@ -93,7 +91,7 @@
         inherit (lib.systems.examples) ghcjs;
       } // lib.optionalAttrs (nixpkgsName == "unstable"
           && (__match ".*llvm" compiler-nix-name == null)
-          && !builtins.elem compiler-nix-name ["ghc967" "ghc984" "ghc9102" "ghc9103"]
+          && !builtins.elem compiler-nix-name ["ghc967" "ghc984" "ghc9103"]
           && system != "x86_64-darwin") {
         inherit (lib.systems.examples) wasi32;
       } // lib.optionalAttrs (nixpkgsName == "unstable"
@@ -113,9 +111,12 @@
       } // lib.optionalAttrs (__match ".*llvm" compiler-nix-name == null && system == "x86_64-linux" && nixpkgsName == "unstable" && !builtins.elem compiler-nix-name ["ghc902" "ghc928" "ghc948"]) {
         # Out llvm versions of GHC seem to break for musl32
         inherit (lib.systems.examples) musl32;
-      } // lib.optionalAttrs (system == "x86_64-linux" && !builtins.elem compiler-nix-name ["ghc902" "ghc928" "ghc948"]) {
+      } // lib.optionalAttrs (system == "x86_64-linux"
+          && !builtins.elem compiler-nix-name ["ghc967" "ghc984" "ghc9103"]) {
         inherit (lib.systems.examples) aarch64-android-prebuilt;
-      } // lib.optionalAttrs (system == "x86_64-linux" && nixpkgsName != "unstable" && !builtins.elem compiler-nix-name ["ghc902" "ghc928" "ghc948" "ghc9103" "ghc9103llvm" "ghc91320250523"]) {
+      } // lib.optionalAttrs (system == "x86_64-linux"
+          && nixpkgsName != "unstable"
+          && !builtins.elem compiler-nix-name ["ghc967" "ghc984" "ghc9103" "ghc91320250523"]) {
         inherit (lib.systems.examples) armv7a-android-prebuilt;
       } // lib.optionalAttrs (system == "x86_64-linux" && nixpkgsName == "unstable" && !builtins.elem compiler-nix-name ["ghc8107" "ghc902"]) {
         # TODO fix this for the compilers we build with hadrian (ghc >=9.4)

default.nix

@@ -100,6 +100,9 @@ self // {
   pkgs-2505 = import self.inputs.nixpkgs-2505 (nixpkgsArgs // {
     localSystem = { inherit system; };
   });
+  pkgs-2511 = import self.inputs.nixpkgs-2511 (nixpkgsArgs // {
+    localSystem = { inherit system; };
+  });
   pkgs-unstable = import self.inputs.nixpkgs-unstable (nixpkgsArgs // {
     localSystem = { inherit system; };
   });

flake.lock

@@ -8,6 +8,7 @@
     nixpkgs-2405 = { url = "github:NixOS/nixpkgs/nixpkgs-24.05-darwin"; };
     nixpkgs-2411 = { url = "github:NixOS/nixpkgs/nixpkgs-24.11-darwin"; };
     nixpkgs-2505 = { url = "github:NixOS/nixpkgs/nixpkgs-25.05-darwin"; };
+    nixpkgs-2511 = { url = "github:NixOS/nixpkgs/nixpkgs-25.11-darwin"; };
     nixpkgs-unstable = { url = "github:NixOS/nixpkgs/nixpkgs-unstable"; };
     flake-compat = { url = "github:input-output-hk/flake-compat/hkm/gitlab-fix"; flake = false; };
     "hls-1.10" = { url = "github:haskell/haskell-language-server/1.10.0.0"; flake = false; };

flake.nix

@@ -5,11 +5,11 @@ final: prev: {
       examples = prev.lib.systems.examples // {
         aarch64-android = prev.lib.systems.examples.aarch64-android // {
           androidSdkVersion = "269";
-          androidNdkVersion = "24";
+          androidNdkVersion = "27";
         };
         armv7a-android-prebuilt = prev.lib.systems.examples.armv7a-android-prebuilt // {
           androidSdkVersion = "26";
-          androidNdkVersion = "24";
+          androidNdkVersion = "27";
         };
       };
     };