From 606370d8539613b6698b47b39f828b886ddf82c2 Mon Sep 17 00:00:00 2001
From: Michael Fellinger <michael.fellinger@iohk.io>
Date: Fri, 17 Apr 2020 16:51:01 +0200
Subject: [PATCH] crystal: use llvm 10 exclusively

---
 pkgs/top-level/all-packages.nix | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3cb27cf590e..4b6a2b77427 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8077,8 +8077,7 @@ in
   cryptol = haskell.lib.justStaticExecutables haskellPackages.cryptol;
 
   inherit (callPackages ../development/compilers/crystal {
-    stdenv = if stdenv.cc.isClang then llvmPackages.stdenv else stdenv;
-    inherit (llvmPackages) clang llvm;
+    inherit (llvmPackages_10) stdenv clang llvm;
   })
     crystal_0_31
     crystal_0_32