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-rw-r--r--pkgs/development/compilers/rustc/0.11.nix2
1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/development/compilers/rustc/0.11.nix b/pkgs/development/compilers/rustc/0.11.nix
index 1c3b09b0985..a7246e44a73 100644
--- a/pkgs/development/compilers/rustc/0.11.nix
+++ b/pkgs/development/compilers/rustc/0.11.nix
@@ -1,5 +1,7 @@
 {stdenv, fetchurl, which, file, perl, curl, python27, makeWrapper}:
 
+assert stdenv.gcc.gcc != null;
+
 /* Rust's build process has a few quirks :
 
 - It requires some patched in llvm that haven't landed upstream, so it