@@ -265,13 +265,14 @@ def joinuser(*args):
 def _get_path(userbase):
     version = sys.version_info
 
+    # XXX RUSTPYTHON: we replace pythonx.y with rustpythonx.y
     if os.name == 'nt':
-        return f'{userbase}\\Python{version[0]}{version[1]}\\site-packages'
+        return f'{userbase}\\RustPython{version[0]}{version[1]}\\site-packages'
 
     if sys.platform == 'darwin' and sys._framework:
-        return f'{userbase}/lib/python/site-packages'
+        return f'{userbase}/lib/rustpython/site-packages'
 
-    return f'{userbase}/lib/python{version[0]}.{version[1]}/site-packages'
+    return f'{userbase}/lib/rustpython{version[0]}.{version[1]}/site-packages'
 
 
 def getuserbase():
 
@@ -80,6 +80,12 @@
         },
     }
 
+# XXX RUSTPYTHON: replace python with rustpython in all these paths
+for group in _INSTALL_SCHEMES.values():
+    for key in group.keys():
+        group[key] = group[key].replace("Python", "RustPython").replace("python", "rustpython")
+
+
 _SCHEME_KEYS = ('stdlib', 'platstdlib', 'purelib', 'platlib', 'include',
                 'scripts', 'data')
 
 
@@ -1,13 +1,20 @@
 use crate::pyobject::{ItemProtocol, PyObjectRef};
 use crate::VirtualMachine;
 
+use crate::sysmodule::MULTIARCH;
+
 pub fn make_module(vm: &VirtualMachine) -> PyObjectRef {
     let vars = vm.ctx.new_dict();
     macro_rules! hashmap {
-        ($($key:literal => $value:literal),*) => {{
-            $(vars.set_item($key, vm.ctx.new_str($value.to_owned()), vm).unwrap();)*
+        ($($key:literal => $value:expr),*) => {{
+            $(vars.set_item($key, vm.ctx.new_str($value.into()), vm).unwrap();)*
         }};
     }
+    hashmap! {
+        // fake shared module extension
+        "EXT_SUFFIX" => format!(".rustpython-{}", MULTIARCH),
+        "MULTIARCH" => MULTIARCH,
+    }
     include!(concat!(env!("OUT_DIR"), "/env_vars.rs"));
 
     py_module!(vm, "_sysconfigdata", {
 
@@ -398,7 +398,7 @@ const ABIFLAGS: &str = "";
 // not the same as CPython (e.g. rust's x86_x64-unknown-linux-gnu is just x86_64-linux-gnu)
 // but hopefully that's just an implementation detail? TODO: copy CPython's multiarch exactly,
 // https://github.com/python/cpython/blob/3.8/configure.ac#L725
-const MULTIARCH: &str = env!("RUSTPYTHON_TARGET_TRIPLE");
+pub(crate) const MULTIARCH: &str = env!("RUSTPYTHON_TARGET_TRIPLE");
 
 pub(crate) fn sysconfigdata_name() -> String {
     format!("_sysconfigdata_{}_{}_{}", ABIFLAGS, PLATFORM, MULTIARCH)