diff --git a/pkgs/applications/audio/mopidy-moped/default.nix b/pkgs/applications/audio/mopidy-moped/default.nix
index ee3134f5fd82..c8afd4c6290f 100644
--- a/pkgs/applications/audio/mopidy-moped/default.nix
+++ b/pkgs/applications/audio/mopidy-moped/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pythonPackages, mopidy }:
+{ stdenv, fetchurl, pythonPackages, mopidy, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   name = "mopidy-moped-${version}";
@@ -9,6 +9,8 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "0xff8y1kc7rwwsd7ppgbvywf6i8lchjwbxjisfl1kmilwsb166yr";
   };
 
+  LC_ALL = "en_US.UTF-8";
+  buildInputs = [ glibcLocales ];
   propagatedBuildInputs = [ mopidy ];
 
   doCheck = false;