Throw an error if --arg / --argstr is used with a flake

Fixes #3949.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/nix/profile.cc b/src/nix/profile.cc
index 827f8be5a..4d275f577 100644
--- a/src/nix/profile.cc
+++ b/src/nix/profile.cc
@@ -399,7 +399,13 @@ struct CmdProfileUpgrade : virtual SourceExprCommand, MixDefaultProfile, MixProf
                 Activity act(*logger, lvlChatty, actUnknown,
                     fmt("checking '%s' for updates", element.source->attrPath));
 
-                InstallableFlake installable(getEvalState(), FlakeRef(element.source->originalRef), {element.source->attrPath}, {}, lockFlags);
+                InstallableFlake installable(
+                    this,
+                    getEvalState(),
+                    FlakeRef(element.source->originalRef),
+                    {element.source->attrPath},
+                    {},
+                    lockFlags);
 
                 auto [attrPath, resolvedRef, drv] = installable.toDerivation();