adds --show-trace when --verbose

src/Argonix.hs

@@ -268,7 +268,8 @@ nixArguments :: String -> ArgsCommon -> [String]
 nixArguments target ArgsCommon {..} =
   [unpack argopkgs, "-A", target]
     ++ concat [ ["--arg", longform <> "-src", p] | (longform, p) <- overrides ]
-    ++ (if grafting == Libnrm then [] else ["--arg", "rebuildApps", "false"])
+    ++ (if grafting == Libnrm then ["--arg", "rebuildApps", "false"] else [])
+    ++ ["--show-trace" | verbosity == Verbose]
 
 data NixCommand = NixBuild | NixShell
 toCommand :: IsString p => NixCommand -> p