diff --git a/vm/src/stdlib/sys.rs b/vm/src/stdlib/sys.rs
@@ -10,10 +10,10 @@ mod sys {
            ascii,
            hash::{PyHash, PyUHash},
        },
        frame::FrameRef,
        function::{FuncArgs, OptionalArg, PosArgs},
-        stdlib::builtins,
-        stdlib::warnings::warn,
        types::PyStructSequence,
        version,
        vm::{Settings, VirtualMachine},
@@ -706,6 +706,68 @@ mod sys {
        crate::vm::thread::COROUTINE_ORIGIN_TRACKING_DEPTH.with(|cell| cell.get()) as _
    }

    /// sys.flags
    ///
    /// Flags provided through command line arguments or environment vars.

diff --git a/vm/src/vm/thread.rs b/vm/src/vm/thread.rs
@@ -1,4 +1,4 @@
-use crate::{AsObject, PyObject, VirtualMachine};
use itertools::Itertools;
use std::{
    cell::{Cell, RefCell},
@@ -11,6 +11,8 @@ thread_local! {
    static VM_CURRENT: RefCell<*const VirtualMachine> = std::ptr::null::<VirtualMachine>().into();

    pub(crate) static COROUTINE_ORIGIN_TRACKING_DEPTH: Cell<u32> = const { Cell::new(0) };
}

pub fn with_current_vm<R>(f: impl FnOnce(&VirtualMachine) -> R) -> R {