diff --git a/build.nix b/build.nix
index 6939a16517..70a2ab772e 100644
--- a/build.nix
+++ b/build.nix
@@ -60,12 +60,7 @@ in rec {
     } // pkgs.lib.optionalAttrs (ghcFromTo "9.0" "9.11") {
       "hls" = tool compiler-nix-name "haskell-language-server" {
         inherit evalPackages;
-        src = pkgs.haskell-nix.sources.hls;
-        cabalProjectLocal = ''
-          if impl(ghc >=9.6.7) && impl(ghc <9.7) || impl(ghc >=9.8.3)
-            constraints: ghc-lib-parser >=9.8.4
-            allow-older: ghc-lib-parser:filepath
-        '';
+        src = pkgs.haskell-nix.sources."hls-2.10";
       };
     })
   );
diff --git a/flake.lock b/flake.lock
index 095211d470..6bfa0c5871 100644
--- a/flake.lock
+++ b/flake.lock
@@ -336,6 +336,23 @@
         "type": "github"
       }
     },
+    "hls-2.10": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1743069404,
+        "narHash": "sha256-q4kDFyJDDeoGqfEtrZRx4iqMVEC2MOzCToWsFY+TOzY=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "2318c61db3a01e03700bd4b05665662929b7fe8b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.10.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
     "hpc-coveralls": {
       "flake": false,
       "locked": {
@@ -488,6 +505,7 @@
         "hls-2.7": "hls-2.7",
         "hls-2.8": "hls-2.8",
         "hls-2.9": "hls-2.9",
+        "hls-2.10": "hls-2.10",
         "hpc-coveralls": "hpc-coveralls",
         "iserv-proxy": "iserv-proxy",
         "nixpkgs": [
diff --git a/flake.nix b/flake.nix
index 65ffb7ef5e..017d695555 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,6 +19,7 @@
     "hls-2.7" = { url = "github:haskell/haskell-language-server/2.7.0.0"; flake = false; };
     "hls-2.8" = { url = "github:haskell/haskell-language-server/2.8.0.0"; flake = false; };
     "hls-2.9" = { url = "github:haskell/haskell-language-server/2.9.0.1"; flake = false; };
+    "hls-2.10" = { url = "github:haskell/haskell-language-server/2.10.0.0"; flake = false; };
     "hls"     = { url = "github:haskell/haskell-language-server"; flake = false; };
     hackage = {
       url = "github:input-output-hk/hackage.nix";
diff --git a/test/haskell-language-server/cabal.nix b/test/haskell-language-server/cabal.nix
index 3d1e5c378b..9c218d4bb7 100644
--- a/test/haskell-language-server/cabal.nix
+++ b/test/haskell-language-server/cabal.nix
@@ -3,13 +3,8 @@ let
   project = haskell-nix.cabalProject' {
     inherit compiler-nix-name evalPackages;
     name = "haskell-language-server";
-    src = haskell-nix.sources.hls;
+    src = haskell-nix.sources."hls-2.10";
     configureArgs = "--disable-benchmarks --disable-tests"; # This makes cabalProject' more like the `tool` function
-    cabalProjectLocal = ''
-      if impl(ghc >=9.6.7) && impl(ghc <9.7) || impl(ghc >=9.8.3)
-        constraints: ghc-lib-parser >=9.8.4
-        allow-older: ghc-lib-parser:filepath
-    '';
   };
 in recurseIntoAttrs {
   ifdInputs = {