From 57adfbd3d41b469428edd49a0057a628052729a4 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 31 Jul 2019 16:55:35 +0200
Subject: [PATCH] rustc: Drop RUSTC_BOOTSTRAP

It's no longer needed.
---
 pkgs/development/compilers/rust/rustc.nix | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 66da4d33251..615e71984b6 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -45,12 +45,6 @@ in stdenv.mkDerivation rec {
     ++ optional (stdenv.isDarwin && !withBundledLLVM) "-lc++"
     ++ optional stdenv.isDarwin "-rpath ${llvmSharedForHost}/lib";
 
-  # Enable nightly features in stable compiles (used for
-  # bootstrapping, see https://github.com/rust-lang/rust/pull/37265).
-  # This loosens the hard restrictions on bootstrapping-compiler
-  # versions.
-  RUSTC_BOOTSTRAP = "1";
-
   # Increase codegen units to introduce parallelism within the compiler.
   RUSTFLAGS = "-Ccodegen-units=10";