From bdcb457450a574632519af6aae6112a0c48e8dad Mon Sep 17 00:00:00 2001
From: Sander <hey@sandydoo.me>
Date: Wed, 3 Apr 2024 08:15:02 +0000
Subject: [PATCH] Fix devenv up with the impure option

Only pass the `--impure` option to the modern nix command that supports
it.
---
 devenv/src/command.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/devenv/src/command.rs b/devenv/src/command.rs
index 15fdccc7a..3d9a0a18d 100644
--- a/devenv/src/command.rs
+++ b/devenv/src/command.rs
@@ -140,7 +140,11 @@ impl App {
             };
 
             if self.cli.impure || self.config.impure {
-                flags.push("--impure");
+                // only pass the impure option to the nix command that supports it.
+                // avoid passing it to the older utilities, e.g. like `nix-store` when creating GC roots.
+                if command == "nix" {
+                    flags.push("--impure");
+                }
                 // set a dummy value to overcome https://github.com/NixOS/nix/issues/10247
                 cmd.env("NIX_PATH", ":");
             }