nix: Support -j flag

2 files changed, 9 insertions, 4 deletions

diff --git a/src/libmain/common-args.cc b/src/libmain/common-args.cc
index 4c35a4199590..9e1d7cee60e6 100644
--- a/src/libmain/common-args.cc
+++ b/src/libmain/common-args.cc
@@ -35,6 +35,15 @@ MixCommonArgs::MixCommonArgs(const string & programName)
             }
         });
 
+    mkFlag()
+        .longName("max-jobs")
+        .shortName('j')
+        .label("jobs")
+        .description("maximum number of parallel builds")
+        .handler([=](std::string s) {
+            settings.set("max-jobs", s);
+        });
+
     std::string cat = "config";
     globalConfig.convertToArgs(*this, cat);
 
diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 4ed34e54dc55..cd752f4678a0 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -175,10 +175,6 @@ LegacyArgs::LegacyArgs(const std::string & programName,
         .description("build from source if substitution fails")
         .set(&(bool&) settings.tryFallback, true);
 
-    mkFlag1('j', "max-jobs", "jobs", "maximum number of parallel builds", [=](std::string s) {
-        settings.set("max-jobs", s);
-    });
-
     auto intSettingAlias = [&](char shortName, const std::string & longName,
         const std::string & description, const std::string & dest) {
         mkFlag<unsigned int>(shortName, longName, description, [=](unsigned int n) {