[PATCH nixpkgs] spectrumPackages.rootfs: fix custom path entries

[Alyssa Ross <hi@alyssa.is>]

Stage 1 was supposed to be able to take a list of PATH entries to
prepend to the default PATH, but it didn't do anything with them.
Now, it properly adds them to the PATH as early as possible during
boot.

This mechanism isn't currently used anywhere, but is very useful for
debugging.
---
 pkgs/os-specific/linux/spectrum/rootfs/generic.nix | 3 ++-
 pkgs/os-specific/linux/spectrum/rootfs/stage1.nix  | 7 +++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/pkgs/os-specific/linux/spectrum/rootfs/generic.nix b/pkgs/os-specific/linux/spectrum/rootfs/generic.nix
index 0a99f99bd5b..81fb80a614f 100644
--- a/pkgs/os-specific/linux/spectrum/rootfs/generic.nix
+++ b/pkgs/os-specific/linux/spectrum/rootfs/generic.nix
@@ -8,7 +8,8 @@
 let
   makeStage1 = import ./stage1.nix {
     inherit writeScript lib
-      execline s6 s6-portable-utils s6-linux-utils s6-linux-init busybox mesa;
+      execline s6 s6-portable-utils s6-linux-utils s6-linux-init busybox mesa
+      path;
   };
 
   makeServicesDir = import ./services.nix {
diff --git a/pkgs/os-specific/linux/spectrum/rootfs/stage1.nix b/pkgs/os-specific/linux/spectrum/rootfs/stage1.nix
index be7853316e9..6caf9ff93b8 100644
--- a/pkgs/os-specific/linux/spectrum/rootfs/stage1.nix
+++ b/pkgs/os-specific/linux/spectrum/rootfs/stage1.nix
@@ -1,16 +1,19 @@
 { writeScript, lib
 , execline, s6, s6-portable-utils, s6-linux-utils, s6-linux-init, busybox, mesa
+, path ? []
 }:
 
 { run ? "true" }:
 
 let
-  path = [ s6 s6-portable-utils s6-linux-utils s6-linux-init busybox execline ];
+  path' = path ++ [
+    s6 s6-portable-utils s6-linux-utils s6-linux-init busybox execline
+  ];
 in
 
 writeScript "init-stage1" ''
   #! ${execline}/bin/execlineb -P
-  export PATH ${lib.makeBinPath path}
+  export PATH ${lib.makeBinPath path'}
   ${s6}/bin/s6-setsid -qb --
 
   importas -i spectrumcmd spectrumcmd
-- 
2.30.0