From f7ed1663f3ee34178872c35c3a0f1521ea13258e Mon Sep 17 00:00:00 2001
From: Hraban Luyat <hraban@0brg.net>
Date: Fri, 1 Mar 2024 20:09:39 -0500
Subject: [PATCH] sbcl: assert coreCompression -> !purgeNixReferences

---
 pkgs/development/compilers/sbcl/default.nix | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/sbcl/default.nix b/pkgs/development/compilers/sbcl/default.nix
index e8933d045e37..0262584c3e37 100644
--- a/pkgs/development/compilers/sbcl/default.nix
+++ b/pkgs/development/compilers/sbcl/default.nix
@@ -94,7 +94,14 @@ stdenv.mkDerivation (self: rec {
       strace
     ]
   );
-  buildInputs = lib.optionals coreCompression [ zstd ];
+  buildInputs = lib.optionals coreCompression (
+    # Declare at the point of actual use in case the caller wants to override
+    # buildInputs to sidestep this.
+    assert lib.assertMsg (!purgeNixReferences) ''
+      Cannot enable coreCompression when purging Nix references, because compression requires linking in zlib
+    '';
+    [ zstd ]
+  );
 
   patches = lib.optionals (lib.versionOlder self.version "2.4.2") [
     # Fixed in 2.4.2