Revert "hydra-eval-jobs -> nix eval-hydra-jobs"

This reverts commit 345512a6d0.

src/script/hydra-eval-jobset

@@ -330,27 +330,22 @@ sub inputsToArgs {
 sub evalJobs {
     my ($inputInfo, $nixExprInputName, $nixExprPath, $flakeRef) = @_;
 
-    my @cmd = (
-        "nix", "eval-hydra-jobs",
-        "--json",
-        "--gc-roots-dir", getGCRootsDir,
-        "--max-jobs", 1,
-        "--workers", $config->{evaluator_workers} // 1,
-        "--max-memory-size", $config->{evaluator_max_memory_size} // 4096,
-        "--builders", "",
-        );
+    my @cmd;
 
     if (defined $flakeRef) {
-        push @cmd,
-            ($flakeRef,
-             "--no-update-lock-file",
-             "--no-registries");
+        @cmd = ("hydra-eval-jobs",
+                "--flake", $flakeRef,
+                "--gc-roots-dir", getGCRootsDir,
+                "--max-jobs", 1);
     } else {
         my $nixExprInput = $inputInfo->{$nixExprInputName}->[0]
             or die "cannot find the input containing the job expression\n";
-        push @cmd,
-            ("--file", "<" . $nixExprInputName . "/" . $nixExprPath . ">",
-             inputsToArgs($inputInfo));
+
+        @cmd = ("hydra-eval-jobs",
+                "<" . $nixExprInputName . "/" . $nixExprPath . ">",
+                "--gc-roots-dir", getGCRootsDir,
+                "--max-jobs", 1,
+                inputsToArgs($inputInfo));
     }
 
     if (defined $ENV{'HYDRA_DEBUG'}) {