From 27be54ca533933db8c3e0cde4b213abf10dd5237 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Tue, 6 Sep 2022 18:27:39 +0200
Subject: [PATCH] nix develop: Ignore stdenv's $SHELL

Stdenv sets this to a bash that doesn't have readline/completion
support, so running 'nix (develop|shell)' inside a 'nix develop' gives
you a crippled shell. So let's just ignore the derivation's $SHELL.

This could break interactive use of build phases that use $SHELL, but
they appear to be fairly rare.
---
 src/nix/develop.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index ba7ba7c25..4de109754 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -246,6 +246,7 @@ struct Common : InstallableCommand, MixProfile
         "NIX_LOG_FD",
         "NIX_REMOTE",
         "PPID",
+        "SHELL",
         "SHELLOPTS",
         "SSL_CERT_FILE", // FIXME: only want to ignore /no-cert-file.crt
         "TEMP",