Process nix.conf options in "new" nix commands, add test.

Without this (minor) change, the options set using "--option"
or read from nix.conf were parsed but not used.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/nix/main.cc b/src/nix/main.cc
index 440ced97d..fdb8f6e3a 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -42,6 +42,7 @@ void mainWrapped(int argc, char * * argv)
     NixArgs args;
 
     args.parseCmdline(argvToStrings(argc, argv));
+    settings.update();
 
     assert(args.command);