diff --git a/shell.nix b/shell.nix
index 152b0de..183fa46 100644
--- a/shell.nix
+++ b/shell.nix
@@ -26,6 +26,7 @@ in pkgs.mkShell rec {
       rustup default nightly
 	  rustup component add llvm-tools-preview
 	  rustup component add rust-analyzer
+      rustup component add rust-src
 	  rustup target add x86_64-unknown-none
       export PATH=$PATH:''${CARGO_HOME:-~/.cargo}/bin
       export PATH=$PATH:''${RUSTUP_HOME:-~/.rustup}/toolchains/nightly-x86_64-unknown-linux-gnu/bin/