diff --git a/src/get_interpreter_metadata.py b/src/get_interpreter_metadata.py
index 99afbe5a2..ef7fb9ec8 100644
--- a/src/get_interpreter_metadata.py
+++ b/src/get_interpreter_metadata.py
@@ -14,7 +14,7 @@
     "u": sysconfig.get_config_var("Py_UNICODE_SIZE") == 4,
     "d": sysconfig.get_config_var("Py_DEBUG") == 1,
     # This one isn't technically necessary, but still very useful for sanity checks
-    "platform": sys.platform,
+    "platform": platform.system().lower(),
 }
 
 print(json.dumps(metadata))
diff --git a/src/python_interpreter.rs b/src/python_interpreter.rs
index 9d397dfbf..ce0290780 100644
--- a/src/python_interpreter.rs
+++ b/src/python_interpreter.rs
@@ -305,10 +305,10 @@ fn fun_with_abiflags(
     target: &Target,
 ) -> Result<String, Error> {
     let sane_platform = match message.platform.as_ref() {
-        "win32" | "win_amd64" => target.is_windows(),
-        "linux" | "linux2" | "linux3" => target.is_linux(),
+        "windows" => target.is_windows(),
+        "linux" => target.is_linux(),
         "darwin" => target.is_macos(),
-        "freebsd11" | "freebsd12" | "freebsd13" => target.is_freebsd(),
+        "freebsd" => target.is_freebsd(),
         _ => false,
     };