diff --git a/scripts/download_sumneko.lua b/scripts/download_sumneko.lua
index 57ee612..3bd14bb 100644
--- a/scripts/download_sumneko.lua
+++ b/scripts/download_sumneko.lua
@@ -48,7 +48,7 @@ end
 
 local function build()
   run {
-    "ninja", "-f", string.format("ninja/%s.ninja", string.lower(jit.os)),
+    "ninja", "-f", string.format("ninja/%s.ninja", jit.os == "OSX" and "macOS" or string.lower(jit.os)),
     cwd = directory .. "/3rd/luamake",
   }