diff --git a/Cargo.toml b/Cargo.toml
index 50860340..45f0b077 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,3 @@ r0 = "0.2.1"
 [features]
 # provides a panic_fmt implementation that calls the abort instruction (`udf 0xfe`)
 abort-on-panic = []
-
-[build-dependencies]
-rustc_version = "0.2.1"
-chrono = "0.4.0"
diff --git a/build.rs b/build.rs
index 7784b980..1d0160c0 100644
--- a/build.rs
+++ b/build.rs
@@ -1,22 +1,9 @@
-extern crate chrono;
-extern crate rustc_version;
-
 use std::env;
 use std::fs::File;
 use std::io::Write;
 use std::path::PathBuf;
 
-use chrono::NaiveDate;
-
 fn main() {
-    let meta = rustc_version::version_meta().unwrap();
-    if meta.channel == rustc_version::Channel::Dev
-        || meta.commit_date.unwrap().parse::<NaiveDate>().unwrap()
-            > NaiveDate::from_ymd(2017, 12, 26)
-    {
-        println!("cargo:rustc-cfg=has_termination_lang")
-    }
-
     let target = env::var("TARGET").unwrap();
 
     has_fpu(&target);
diff --git a/src/lang_items.rs b/src/lang_items.rs
index f3750a09..7d7a598c 100644
--- a/src/lang_items.rs
+++ b/src/lang_items.rs
@@ -24,7 +24,6 @@ unsafe extern "C" fn panic_fmt(_: ::core::fmt::Arguments, _: &'static str, _: u3
 // The final piece is that the entry point of our program, the reset handler,
 // has to call `rustc_main`. That's covered by the `reset_handler` function in
 // root of this crate.
-#[cfg(has_termination_lang)]
 #[lang = "start"]
 extern "C" fn start<T>(main: fn() -> T, _argc: isize, _argv: *const *const u8) -> isize
 where
@@ -35,21 +34,11 @@ where
     0
 }
 
-#[cfg(not(has_termination_lang))]
-#[lang = "start"]
-extern "C" fn start(main: fn(), _argc: isize, _argv: *const *const u8) -> isize {
-    main();
-
-    0
-}
-
 #[lang = "termination"]
-#[cfg(has_termination_lang)]
 pub trait Termination {
     fn report(self) -> i32;
 }
 
-#[cfg(has_termination_lang)]
 impl Termination for () {
     fn report(self) -> i32 {
         0