From b6f98b52a4b22c5d349266175dd8395c5c6b8f6f Mon Sep 17 00:00:00 2001
From: Sergei Zimmerman <sergei@zimmerman.foo>
Date: Sat, 30 Aug 2025 00:03:54 +0300
Subject: [PATCH] nix/develop: Fix misleading ignored error when run with
 --arg/--argstr

This would print erroneous and misleading diagnostics like:

> error (ignored): error: '--arg' and '--argstr' are incompatible with flakes

When run with --expr/--file. Since this installable is used to get the
bash package it doesn't make sense to check this.
---
 src/nix/develop.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index f59dc5bee..ed25e655d 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -647,7 +647,7 @@ struct CmdDevelop : Common, MixEnvironment
                 nixpkgs = i->nixpkgsFlakeRef();
 
             auto bashInstallable = make_ref<InstallableFlake>(
-                this,
+                nullptr, //< Don't barf when the command is run with --arg/--argstr
                 state,
                 std::move(nixpkgs),
                 "bashInteractive",