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-rw-r--r--pkgs/build-support/fetchhg/default.nix4
1 files changed, 1 insertions, 3 deletions
diff --git a/pkgs/build-support/fetchhg/default.nix b/pkgs/build-support/fetchhg/default.nix
index 214e9b1387b..79f610166a7 100644
--- a/pkgs/build-support/fetchhg/default.nix
+++ b/pkgs/build-support/fetchhg/default.nix
@@ -6,9 +6,7 @@ stdenv.mkDerivation {
   builder = ./builder.sh;
   buildInputs = [mercurial];
 
-  impureEnvVars = [
-    "http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"
-  ];
+  impureEnvVars = stdenv.lib.fetchers.proxyImpureEnvVars;
 
   # Nix <= 0.7 compatibility.
   id = md5;