From c1dbaed781e769cb9d5383b031e5ef82e3acbeae Mon Sep 17 00:00:00 2001
From: Maximilian Bosch <maximilian@mbosch.me>
Date: Fri, 11 Sep 2020 23:36:10 +0200
Subject: [PATCH] top-level: fix nix-shell eval w/nixUnstable

For a full description of the underlying issue please read
https://github.com/NixOS/nix/issues/4003

(cherry picked from commit fa6064ad86a020f52a75219bff044714f2a9ebbd)
---
 pkgs/top-level/impure.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/top-level/impure.nix b/pkgs/top-level/impure.nix
index 3ba6c08a140b2..88440f711d363 100644
--- a/pkgs/top-level/impure.nix
+++ b/pkgs/top-level/impure.nix
@@ -81,7 +81,7 @@ in
 # not be passed.
 assert args ? localSystem -> !(args ? system || args ? platform);
 
-import ./. (builtins.removeAttrs args [ "system" "platform" ] // {
+import ./. (builtins.removeAttrs args [ "system" "platform" "inNixShell" ] // {
   inherit config overlays crossSystem crossOverlays;
   # Fallback: Assume we are building packages on the current (build, in GNU
   # Autotools parlance) system.