From bf7960a4ede0f5ba7e88b939ed0f33aa6087cbc6 Mon Sep 17 00:00:00 2001
From: regnat <rg@regnat.ovh>
Date: Tue, 29 Jun 2021 10:13:42 +0200
Subject: [PATCH] develop: Discard the input{Overrides,Updates} when getting
 bash
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`nix develop` is getting bash from an (assumed existing) `nixpkgs`
flake. However, when doing so, it reuses the `lockFlags` passed to the
current flake, including the `--input-overrides` and `--input-update`
which generally don’t make sense anymore at that point (and trigger a
warning because of that)

Clear these overrides before getting the nixpkgs flake to get rid of the
warning.
---
 src/nix/develop.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index d77ff52d7..6c089469d 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -443,13 +443,17 @@ struct CmdDevelop : Common, MixEnvironment
         try {
             auto state = getEvalState();
 
+            auto nixpkgsLockFlags = lockFlags;
+            nixpkgsLockFlags.inputOverrides = {};
+            nixpkgsLockFlags.inputUpdates = {};
+
             auto bashInstallable = std::make_shared<InstallableFlake>(
                 this,
                 state,
                 installable->nixpkgsFlakeRef(),
                 Strings{"bashInteractive"},
                 Strings{"legacyPackages." + settings.thisSystem.get() + "."},
-                lockFlags);
+                nixpkgsLockFlags);
 
             shell = state->store->printStorePath(
                 toStorePath(state->store, Realise::Outputs, OperateOn::Output, bashInstallable)) + "/bin/bash";