subprojects/nix-eval-jobs: don't set NIX_PATH

Corresponding upstream change: https://github.com/nix-community/nix-eval-jobs/commit/f584ae856ebab2d20115c5d1424f4d2fb9e0e6a6.patch

Co-authored-by: Mic92 <joerg@thalheim.io>
Change-Id: Id6085968f7f4ccdbc8035f608ff75420fbf962a5

doc/manual/change-authors.yml

@@ -156,6 +156,9 @@ ma27:
 matthewbauer:
   github: matthewbauer
 
+mic92:
+  github: mic92
+
 midnightveil:
   display_name: julia
   forgejo: midnightveil

doc/manual/rl-next/nix_path-nix-eval-jobs.md

@@ -0,0 +1,10 @@
+---
+synopsis: "nix-eval-jobs: retain NIX_PATH"
+issues: []
+cls: [3859]
+category: Fixes
+credits: [ma27,mic92]
+---
+
+`nix-eval-jobs` doesn't clear the `NIX_PATH` from the environment anymore. This matches the behavior
+of [upstream version `2.30`](https://github.com/nix-community/nix-eval-jobs/releases/tag/v2.30.0).

subprojects/nix-eval-jobs/src/nix-eval-jobs.cc

@@ -355,10 +355,6 @@ void collector(MyArgs &myArgs, Sync<State> &state_,
 
 int main(int argc, char **argv) {
 
-    /* Prevent undeclared dependencies in the evaluation via
-       $NIX_PATH. */
-    unsetenv("NIX_PATH");
-
     /* We are doing the garbage collection by killing forks */
     setenv("GC_DONT_GC", "1", 1);