From abd94905b5a26111f13c1ee46483ee02218769b1 Mon Sep 17 00:00:00 2001
From: Jonathan Troyer <15098499+JonathanTroyer@users.noreply.github.com>
Date: Wed, 18 Mar 2026 10:28:56 -0500
Subject: [PATCH] nixos/regreet: fix extraCss store paths written as literal
 text

lib.isPath only matches Nix path literals, not strings containing
store paths. When extraCss is set to a derivation's outPath (a string
like "/nix/store/..."), the condition falls through to the `text`
branch, writing the store path as literal CSS content instead of using
it as a file source.

Add lib.isStorePath to the condition so string store paths are
correctly handled via `source`.

Ref: https://github.com/nix-community/stylix/issues/2190
---
 nixos/modules/programs/regreet.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/programs/regreet.nix b/nixos/modules/programs/regreet.nix
index 151ad3a623ca..800642e2087a 100644
--- a/nixos/modules/programs/regreet.nix
+++ b/nixos/modules/programs/regreet.nix
@@ -159,7 +159,10 @@ in
 
     environment.etc = {
       "greetd/regreet.css" =
-        if lib.isPath cfg.extraCss then { source = cfg.extraCss; } else { text = cfg.extraCss; };
+        if lib.isPath cfg.extraCss || lib.isStorePath cfg.extraCss then
+          { source = cfg.extraCss; }
+        else
+          { text = cfg.extraCss; };
 
       "greetd/regreet.toml".source =
         if lib.isPath cfg.settings then