From 8908beaf744c2e4ac7eda1f2c182b931575faa09 Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Mon, 9 Feb 2026 22:36:21 +0100
Subject: [PATCH] buildCrystalPackage: move env variable(s) into env for
 structuredAttrs

---
 pkgs/development/compilers/crystal/build-package.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/crystal/build-package.nix b/pkgs/development/compilers/crystal/build-package.nix
index 7914b7d7771e..f4044b6a7781 100644
--- a/pkgs/development/compilers/crystal/build-package.nix
+++ b/pkgs/development/compilers/crystal/build-package.nix
@@ -108,9 +108,11 @@ stdenv.mkDerivation (
         ++ [ "runHook postConfigure" ]
       ));
 
-    CRFLAGS = lib.concatStringsSep " " defaultOptions;
+    env = {
+      CRFLAGS = lib.concatStringsSep " " defaultOptions;
 
-    PREFIX = placeholder "out";
+      PREFIX = placeholder "out";
+    };
 
     inherit enableParallelBuilding;
     strictDeps = true;