From a26a9727af4d728db25f2bf5df1d3631ad7ad6f8 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Mon, 22 Dec 2025 22:26:24 +0000
Subject: [PATCH] python314Packages.ray: fix the eval
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Without the change the eval fails in an obscure way
by trying to evaluate set as a string:

    $ nix build -f. python314Packages.ray.src
    error:
       … while calling a functor (an attribute set with a '__functor' attribute)
         at pkgs/development/python-modules/ray/default.nix:116:5:
          115|     in
          116|     fetchPypi {
             |     ^
          117|       inherit pname version format;

       … while evaluating a branch condition
         at lib/customisation.nix:199:7:
          198|       in
          199|       if isAttrs result then
             |       ^
          200|         result

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: cannot coerce a set to a string: { }

After the change the failure is reported via catchable `throw`:

    $ nix build -f. python314Packages.ray.src
    error:
       … while calling a functor (an attribute set with a '__functor' attribute)
         at pkgs/development/python-modules/ray/default.nix:116:5:
          115|     in
          116|     fetchPypi {
             |     ^
          117|       inherit pname version format;

       … while evaluating a branch condition
         at lib/customisation.nix:199:7:
          198|       in
          199|       if isAttrs result then
             |       ^
          200|         result

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: No hash specified for 'x86_64-linux.cp314'
---
 pkgs/development/python-modules/ray/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/ray/default.nix b/pkgs/development/python-modules/ray/default.nix
index 5a3c141bf44e..3041b01a1141 100644
--- a/pkgs/development/python-modules/ray/default.nix
+++ b/pkgs/development/python-modules/ray/default.nix
@@ -119,7 +119,9 @@ buildPythonPackage rec {
       python = pyShortVersion;
       abi = pyShortVersion;
       platform = platforms.${stdenv.hostPlatform.system} or { };
-      sha256 = hashes.${stdenv.hostPlatform.system}.${pyShortVersion} or { };
+      sha256 =
+        hashes.${stdenv.hostPlatform.system}.${pyShortVersion}
+          or (throw "No hash specified for '${stdenv.hostPlatform.system}.${pyShortVersion}'");
     };
 
   nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [