From 39e6ebdfe1552028cd33eec26678a54d2f848f52 Mon Sep 17 00:00:00 2001
From: Johannes Maier <kenranunderscore@users.noreply.github.com>
Date: Wed, 22 Jun 2022 18:06:54 +0200
Subject: [PATCH] buildDhallUrl: fix impure proxy variable passing (#178544)

PR #177891 tried fixing a problem with `buildDhallUrl` in environments
where proxy variables are necessary for internet access to work.  The
`impureEnvVars` should be set in `downloadEncodedFile` instead of the
final `runCommand`, as the former is an FOD, the latter isn't.
---
 pkgs/development/interpreters/dhall/build-dhall-url.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/dhall/build-dhall-url.nix b/pkgs/development/interpreters/dhall/build-dhall-url.nix
index 9dcd885d25c3..6d7103f78e6f 100644
--- a/pkgs/development/interpreters/dhall/build-dhall-url.nix
+++ b/pkgs/development/interpreters/dhall/build-dhall-url.nix
@@ -59,6 +59,7 @@ let
         outputHash = hash;
         name = baseNameOf url;
         nativeBuildInputs = [ cacert ];
+        impureEnvVars = lib.fetchers.proxyImpureEnvVars;
       }
       ''
         echo "${url} ${dhallHash}" > in-dhall-file
@@ -76,7 +77,7 @@ let
    sourceFile = "source.dhall";
 
 in
-  runCommand name { impureEnvVars = lib.fetchers.proxyImpureEnvVars; }
+  runCommand name { }
  (''
     set -eu