--- a/src/tools/clippy/src/driver.rs	2018-10-25 20:09:06.143109996 +0300
+++ b/src/tools/clippy/src/driver.rs	2018-10-25 20:11:09.204106005 +0300
@@ -29,54 +29,22 @@
             exit(0);
         }
 
-        let sys_root = option_env!("SYSROOT")
-            .map(String::from)
-            .or_else(|| std::env::var("SYSROOT").ok())
-            .or_else(|| {
-                let home = option_env!("RUSTUP_HOME").or(option_env!("MULTIRUST_HOME"));
-                let toolchain = option_env!("RUSTUP_TOOLCHAIN").or(option_env!("MULTIRUST_TOOLCHAIN"));
-                home.and_then(|home| toolchain.map(|toolchain| format!("{}/toolchains/{}", home, toolchain)))
-            })
-            .or_else(|| {
-                Command::new("rustc")
-                    .arg("--print")
-                    .arg("sysroot")
-                    .output()
-                    .ok()
-                    .and_then(|out| String::from_utf8(out.stdout).ok())
-                    .map(|s| s.trim().to_owned())
-            })
-            .expect("need to specify SYSROOT env var during clippy compilation, or use rustup or multirust");
-
         // Setting RUSTC_WRAPPER causes Cargo to pass 'rustc' as the first argument.
         // We're invoking the compiler programmatically, so we ignore this/
-        let mut orig_args: Vec<String> = env::args().collect();
-        if orig_args.len() <= 1 {
+        let mut args: Vec<String> = env::args().collect();
+        if args.len() <= 1 {
             std::process::exit(1);
         }
-        if Path::new(&orig_args[1]).file_stem() == Some("rustc".as_ref()) {
+        if Path::new(&args[1]).file_stem() == Some("rustc".as_ref()) {
             // we still want to be able to invoke it normally though
-            orig_args.remove(1);
+            args.remove(1);
         }
-        // this conditional check for the --sysroot flag is there so users can call
-        // `clippy_driver` directly
-        // without having to pass --sysroot or anything
-        let mut args: Vec<String> = if orig_args.iter().any(|s| s == "--sysroot") {
-            orig_args.clone()
-        } else {
-            orig_args
-                .clone()
-                .into_iter()
-                .chain(Some("--sysroot".to_owned()))
-                .chain(Some(sys_root))
-                .collect()
-        };
 
         // this check ensures that dependencies are built but not linted and the final
         // crate is
         // linted but not built
         let clippy_enabled = env::var("CLIPPY_TESTS").ok().map_or(false, |val| val == "true")
-            || orig_args.iter().any(|s| s == "--emit=dep-info,metadata");
+            || args.iter().any(|s| s == "--emit=dep-info,metadata");
 
         if clippy_enabled {
             args.extend_from_slice(&["--cfg".to_owned(), r#"feature="cargo-clippy""#.to_owned()]);