ci/eval: reduce closure size

`procps` pulls in 180 MB of systemd, but busybox also provides `kill`.
`busybox` also ships `time`, so no need for that extra dependency.

Using `nativeBuildInputs` pulls in all the -dev outputs of the listed
packages - which we don't need. We only need to run these tools, thus
map to their bin outputs.

Brings down the closure size from 500+ MB to 193 MB for the Eval job.
This probably saves ~10 seconds for the job.

ci/eval/compare/default.nix

@@ -122,7 +122,8 @@ let
 in
 runCommand "compare"
   {
-    nativeBuildInputs = [
+    # Don't depend on -dev outputs to reduce closure size for CI.
+    nativeBuildInputs = map lib.getBin [
       jq
       (python3.withPackages (
         ps: with ps; [

ci/eval/default.nix

@@ -14,10 +14,9 @@
   runCommand,
   writeShellScript,
   symlinkJoin,
-  time,
-  procps,
-  nix,
+  busybox,
   jq,
+  nix,
 }:
 
 let
@@ -48,9 +47,10 @@ let
     runCommand "attrpaths-superset.json"
       {
         src = nixpkgs;
-        nativeBuildInputs = [
+        # Don't depend on -dev outputs to reduce closure size for CI.
+        nativeBuildInputs = map lib.getBin [
+          busybox
           nix
-          time
         ];
       }
       ''
@@ -131,11 +131,11 @@ let
     in
     runCommand "nixpkgs-eval-${evalSystem}"
       {
-        nativeBuildInputs = [
-          nix
-          time
-          procps
+        # Don't depend on -dev outputs to reduce closure size for CI.
+        nativeBuildInputs = map lib.getBin [
+          busybox
           jq
+          nix
         ];
         env = {
           inherit evalSystem chunkSize;
@@ -206,7 +206,8 @@ let
     }:
     runCommand "combined-eval"
       {
-        nativeBuildInputs = [
+        # Don't depend on -dev outputs to reduce closure size for CI.
+        nativeBuildInputs = map lib.getBin [
           jq
         ];
       }