1 files changed, 1 insertions, 1 deletions

diff --git a/src/luarocks/cfg.lua b/src/luarocks/cfg.lua
index 20aa4a21..a02caaee 100644
--- a/src/luarocks/cfg.lua
+++ b/src/luarocks/cfg.lua
@@ -310,7 +310,7 @@ local defaults = {
 }
 
 if detected.windows then
-   local full_prefix = site_config.LUAROCKS_PREFIX.."\\"..cfg.major_version
+   local full_prefix = (site_config.LUAROCKS_PREFIX or (os.getenv("PROGRAMFILES")..[[\LuaRocks]])).."\\"..cfg.major_version
    extra_luarocks_module_dir = full_prefix.."\\lua\\?.lua"
 
    home_config_file = home_config_file and home_config_file:gsub("\\","/")