From faed13673b39e21b6c003672ba342eaae29c95c7 Mon Sep 17 00:00:00 2001
From: Winter <winter@winter.cafe>
Date: Mon, 29 Aug 2022 22:52:51 -0400
Subject: [PATCH] nix develop: use proper permissions for $TMPDIR

Before this change, unsandboxed builds that tried to use `passAsFile` would fail when run within a devshell.
---
 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 ba7ba7c25..ed39fe996 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -298,7 +298,7 @@ struct Common : InstallableCommand, MixProfile
         for (auto & var : savedVars)
             out << fmt("%s=\"$%s:$nix_saved_%s\"\n", var, var, var);
 
-        out << "export NIX_BUILD_TOP=\"$(mktemp -d -t nix-shell.XXXXXX)\"\n";
+        out << "export NIX_BUILD_TOP=\"$(mktemp -d -t nix-shell.XXXXXX)\"\nchmod 1777 \"$NIX_BUILD_TOP\"\n";
         for (auto & i : {"TMP", "TMPDIR", "TEMP", "TEMPDIR"})
             out << fmt("export %s=\"$NIX_BUILD_TOP\"\n", i);