diff --git a/Cargo.lock b/Cargo.lock
index 3acd27383..827aab3e2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -208,9 +208,9 @@ dependencies = [
 
 [[package]]
 name = "cast"
-version = "0.2.3"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b9434b9a5aa1450faa3f9cb14ea0e8c53bb5d2b3c1bfd1ab4fc03e9f33fbfb0"
+checksum = "4c24dab4283a142afa2fdca129b80ad2c6284e073930f964c3a1293c225ee39a"
 dependencies = [
  "rustc_version",
 ]
@@ -297,12 +297,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "convert_case"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
-
 [[package]]
 name = "core-foundation"
 version = "0.7.0"
@@ -598,18 +592,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "derive_more"
-version = "0.99.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f82b1b72f1263f214c0f823371768776c4f5841b942c9883aa8e5ec584fd0ba6"
-dependencies = [
- "convert_case",
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "diff"
 version = "0.1.12"
@@ -1816,23 +1798,13 @@ checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
 [[package]]
 name = "rustc_version"
-version = "0.2.3"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
 dependencies = [
  "semver",
 ]
 
-[[package]]
-name = "rustc_version_runtime"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4076135c155c07b05e4ab54ba0834aca3fc6a5a01610a2339f5ef3223cf8dee5"
-dependencies = [
- "rustc_version",
- "semver",
-]
-
 [[package]]
 name = "rustpython"
 version = "0.1.2"
@@ -1882,7 +1854,6 @@ name = "rustpython-common"
 version = "0.0.0"
 dependencies = [
  "cfg-if 1.0.0",
- "derive_more",
  "hexf-parse",
  "lexical-core",
  "lock_api",
@@ -2038,7 +2009,7 @@ dependencies = [
  "rand 0.8.3",
  "rand_core 0.6.2",
  "result-like",
- "rustc_version_runtime",
+ "rustc_version",
  "rustpython-ast",
  "rustpython-bytecode",
  "rustpython-common",
@@ -2161,18 +2132,9 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "semver"
-version = "0.9.0"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
-dependencies = [
- "semver-parser",
-]
-
-[[package]]
-name = "semver-parser"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+checksum = "568a8e6258aa33c13358f81fd834adb854c6f7c9468520910a9b1e8fac068012"
 
 [[package]]
 name = "serde"
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 833a392d8..09ca92116 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -19,6 +19,5 @@ cfg-if = "1.0"
 once_cell = "1.4.1"
 siphasher = "0.3"
 rand = "0.8"
-derive_more = "0.99.9"
 volatile = "0.3"
 radium = "0.6"
diff --git a/common/src/borrow.rs b/common/src/borrow.rs
index 00a0b4771..d738c4b02 100644
--- a/common/src/borrow.rs
+++ b/common/src/borrow.rs
@@ -4,7 +4,19 @@ use crate::lock::{
 };
 use std::ops::{Deref, DerefMut};
 
-#[derive(Debug, derive_more::From)]
+macro_rules! impl_from {
+    ($lt:lifetime, $gen:ident, $t:ty, $($var:ident($from:ty),)*) => {
+        $(
+            impl<$lt, $gen: ?Sized> From<$from> for $t {
+                fn from(t: $from) -> Self {
+                    Self::$var(t)
+                }
+            }
+        )*
+    };
+}
+
+#[derive(Debug)]
 pub enum BorrowedValue<'a, T: ?Sized> {
     Ref(&'a T),
     MuLock(PyMutexGuard<'a, T>),
@@ -12,6 +24,13 @@ pub enum BorrowedValue<'a, T: ?Sized> {
     ReadLock(PyRwLockReadGuard<'a, T>),
     MappedReadLock(PyMappedRwLockReadGuard<'a, T>),
 }
+impl_from!('a, T, BorrowedValue<'a, T>,
+    Ref(&'a T),
+    MuLock(PyMutexGuard<'a, T>),
+    MappedMuLock(PyImmutableMappedMutexGuard<'a, T>),
+    ReadLock(PyRwLockReadGuard<'a, T>),
+    MappedReadLock(PyMappedRwLockReadGuard<'a, T>),
+);
 
 impl<'a, T: ?Sized> BorrowedValue<'a, T> {
     pub fn map<U: ?Sized, F>(s: Self, f: F) -> BorrowedValue<'a, U>
@@ -45,7 +64,7 @@ impl<T: ?Sized> Deref for BorrowedValue<'_, T> {
     }
 }
 
-#[derive(Debug, derive_more::From)]
+#[derive(Debug)]
 pub enum BorrowedValueMut<'a, T: ?Sized> {
     RefMut(&'a mut T),
     MuLock(PyMutexGuard<'a, T>),
@@ -53,6 +72,13 @@ pub enum BorrowedValueMut<'a, T: ?Sized> {
     WriteLock(PyRwLockWriteGuard<'a, T>),
     MappedWriteLock(PyMappedRwLockWriteGuard<'a, T>),
 }
+impl_from!('a, T, BorrowedValueMut<'a, T>,
+    RefMut(&'a mut T),
+    MuLock(PyMutexGuard<'a, T>),
+    MappedMuLock(PyMappedMutexGuard<'a, T>),
+    WriteLock(PyRwLockWriteGuard<'a, T>),
+    MappedWriteLock(PyMappedRwLockWriteGuard<'a, T>),
+);
 
 impl<'a, T: ?Sized> BorrowedValueMut<'a, T> {
     pub fn map<U: ?Sized, F>(s: Self, f: F) -> BorrowedValueMut<'a, U>
diff --git a/vm/Cargo.toml b/vm/Cargo.toml
index d191d1cf1..a452bcdbb 100644
--- a/vm/Cargo.toml
+++ b/vm/Cargo.toml
@@ -54,7 +54,6 @@ rustpython-bytecode = { path = "../bytecode", version = "0.1.2" }
 rustpython-jit = { path = "../jit", optional = true, version = "0.1.2" }
 rustpython-pylib = { path = "pylib-crate", optional = true, version = "0.1.0" }
 serde = { version = "1.0.66", features = ["derive"] }
-rustc_version_runtime = "0.2.0"
 puruspe = "0.1"
 caseless = "0.2.1"
 chrono = { version = "0.4", features = ["wasmbind"] }
@@ -159,3 +158,4 @@ wasm-bindgen = "0.2"
 
 [build-dependencies]
 itertools = "0.10.0"
+rustc_version = "0.4"
diff --git a/vm/build.rs b/vm/build.rs
index 1ad01760b..c1daf2eb4 100644
--- a/vm/build.rs
+++ b/vm/build.rs
@@ -12,6 +12,10 @@ fn main() {
     );
     println!("cargo:rustc-env=RUSTPYTHON_GIT_TAG={}", git_tag());
     println!("cargo:rustc-env=RUSTPYTHON_GIT_BRANCH={}", git_branch());
+    println!(
+        "cargo:rustc-env=RUSTC_VERSION={}",
+        rustc_version::version().unwrap()
+    );
 
     println!(
         "cargo:rustc-env=RUSTPYTHON_TARGET_TRIPLE={}",
diff --git a/vm/src/version.rs b/vm/src/version.rs
index d2935d107..32952cb6b 100644
--- a/vm/src/version.rs
+++ b/vm/src/version.rs
@@ -59,8 +59,7 @@ pub fn get_version_number() -> String {
 }
 
 pub fn get_compiler() -> String {
-    let rustc_version = rustc_version_runtime::version_meta();
-    format!("rustc {}", rustc_version.semver)
+    format!("rustc {}", env!("RUSTC_VERSION"))
 }
 
 pub fn get_build_info() -> String {