From 1312b27c07f0b4c37bd46a07fedaad7d37f96244 Mon Sep 17 00:00:00 2001
From: Winter M <winter@antithesis.com>
Date: Tue, 20 Jan 2026 14:04:10 -0500
Subject: [PATCH] nixos/systemd: allow disabling the path default for services

There are times where I want to have services without this default,
especially when writing overrides.
---
 nixos/lib/systemd-lib.nix          | 24 +++++++++++++-----------
 nixos/lib/systemd-unit-options.nix |  8 ++++++++
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/nixos/lib/systemd-lib.nix b/nixos/lib/systemd-lib.nix
index 9db4c6fb8c47..734ab3f28b14 100644
--- a/nixos/lib/systemd-lib.nix
+++ b/nixos/lib/systemd-lib.nix
@@ -688,17 +688,19 @@ rec {
       };
     };
 
-  stage2ServiceConfig = {
-    imports = [ serviceConfig ];
-    # Default path for systemd services. Should be quite minimal.
-    config.path = mkAfter [
-      pkgs.coreutils
-      pkgs.findutils
-      pkgs.gnugrep
-      pkgs.gnused
-      systemd
-    ];
-  };
+  stage2ServiceConfig =
+    { config, ... }:
+    {
+      imports = [ serviceConfig ];
+      # Default path for systemd services. Should be quite minimal.
+      config.path = mkIf config.enableDefaultPath (mkAfter [
+        pkgs.coreutils
+        pkgs.findutils
+        pkgs.gnugrep
+        pkgs.gnused
+        systemd
+      ]);
+    };
 
   stage1ServiceConfig = serviceConfig;
 
diff --git a/nixos/lib/systemd-unit-options.nix b/nixos/lib/systemd-unit-options.nix
index eff78fef265d..5e85a9c2a1d9 100644
--- a/nixos/lib/systemd-unit-options.nix
+++ b/nixos/lib/systemd-unit-options.nix
@@ -379,6 +379,14 @@ rec {
           '';
         };
 
+        enableDefaultPath = mkOption {
+          default = true;
+          type = types.bool;
+          description = ''
+            Whether to append a minimal default {env}`PATH` environment variable to the service, containing common system utilities.
+          '';
+        };
+
         serviceConfig = mkOption {
           default = { };
           example = {