--- a/click/_unicodefun.py	2018-06-11 15:08:59.369358278 +0200
+++ b/click/_unicodefun.py	2018-06-11 15:09:09.342325998 +0200
@@ -60,7 +60,7 @@
     extra = ''
     if os.name == 'posix':
         import subprocess
-        rv = subprocess.Popen(['locale', '-a'], stdout=subprocess.PIPE,
+        rv = subprocess.Popen(['@locale@', '-a'], stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE).communicate()[0]
         good_locales = set()
         has_c_utf8 = False