From 957aec0e510399d3244a5d4d434a1883330edb04 Mon Sep 17 00:00:00 2001
From: Mike Pilgrem <mpilgrem@users.noreply.github.com>
Date: Tue, 7 Jul 2026 23:55:25 +0100
Subject: [PATCH] Update Nix-related CI for passage of time

---
 .github/workflows/integration-tests.yml                   | 4 ++--
 .../integration/tests/4095-utf8-pure-nix/files/stack.yaml | 6 +++---
 tests/unit/Stack/NixSpec.hs                               | 8 ++++----
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/integration-tests.yml b/.github/workflows/integration-tests.yml
index 76fb094f37..0cdeddb9ed 100644
--- a/.github/workflows/integration-tests.yml
+++ b/.github/workflows/integration-tests.yml
@@ -128,10 +128,10 @@ jobs:
           # Enter the Nix environment...
           . ~/.nix-profile/etc/profile.d/nix.sh
           # Add a channel named 'nixpkgs' to the list of subscribed channels...
-          nix-channel --add https://nixos.org/channels/nixos-25.11 nixpkgs
+          nix-channel --add https://nixos.org/channels/nixos-26.05 nixpkgs
           # Download the Nix expressions for all subscribed channels...
           #
-          # As at 2026-03-01, nixos-25.11 provides GHC 9.10.2.
+          # As at 2026-07-07, nixos-26.05 provides GHC 9.10.3.
           nix-channel --update
           # The NIX_PATH environment variable sets a list of directories used to
           # look up the location of Nix expressions using paths enclosed in
diff --git a/tests/integration/tests/4095-utf8-pure-nix/files/stack.yaml b/tests/integration/tests/4095-utf8-pure-nix/files/stack.yaml
index 6eed06afb0..71e4c2b032 100644
--- a/tests/integration/tests/4095-utf8-pure-nix/files/stack.yaml
+++ b/tests/integration/tests/4095-utf8-pure-nix/files/stack.yaml
@@ -1,10 +1,10 @@
-# As of 2026-03-01, with channel nixos-25.11, avaiable Nix packages
+# As of 2026-07-07, with channel nixos-26.05, avaiable Nix packages
 # haskell.compiler.ghc*, based on:
 #
 # $ nix-instantiate --eval -E "with import <nixpkgs> {}; lib.attrNames haskell.compiler"
 #
 # are:
 #
-# 948 (GHC 9.4.8), 967 (GHC 9.6.7), 984 (GHC 9.8.4), 9102 (GHC 9.10.2),
-# 9103 (GHC 9.10.3), 9122 (GHC 9.12.2).
+# 948 (GHC 9.4.8), 967 (GHC 9.6.7), 984 (GHC 9.8.4), 9103 (GHC 9.10.3),
+# 9123 (GHC 9.12.3), 9124 (GHC 9.12.4), 9141 (GHC 9.14.1).
 snapshot: ghc-9.10.3
diff --git a/tests/unit/Stack/NixSpec.hs b/tests/unit/Stack/NixSpec.hs
index 9a317f6139..f1783bc708 100644
--- a/tests/unit/Stack/NixSpec.hs
+++ b/tests/unit/Stack/NixSpec.hs
@@ -32,7 +32,7 @@ import           Test.Hspec ( Spec, around_, beforeAll, describe, it, shouldBe )
 
 sampleConfigNixEnabled :: String
 sampleConfigNixEnabled =
-  "snapshot: lts-19.22\n" ++
+  "snapshot: lts-24.49\n" ++
   "packages: ['.']\n" ++
   "system-ghc: true\n" ++
   "nix:\n" ++
@@ -41,7 +41,7 @@ sampleConfigNixEnabled =
 
 sampleConfigNixDisabled :: String
 sampleConfigNixDisabled =
-  "snapshot: lts-19.22\n" ++
+  "snapshot: lts-24.49\n" ++
   "packages: ['.']\n" ++
   "nix:\n" ++
   "   enable: False"
@@ -111,6 +111,6 @@ spec = beforeAll setup $ do
           config.nix.enable `shouldBe` trueOnNonWindows
       it "sees that the only package asked for is glpk and asks for the correct GHC derivation" $ loadConfig' mempty $ \config -> do
         config.nix.packages `shouldBe` ["glpk"]
-        v <- parseVersionThrowing "9.0.2"
+        v <- parseVersionThrowing "9.10.3"
         ghc <- either throwIO pure $ nixCompiler (WCGhc v)
-        ghc `shouldBe` "haskell.compiler.ghc902"
+        ghc `shouldBe` "haskell.compiler.ghc9103"