diff --git a/pkgs/development/tools/rust/racer/default.nix b/pkgs/development/tools/rust/racer/default.nix
index 3cb7a3e2346..ffaae16b742 100644
--- a/pkgs/development/tools/rust/racer/default.nix
+++ b/pkgs/development/tools/rust/racer/default.nix
@@ -17,9 +17,11 @@ buildRustPackage rec {
   buildInputs = [ makeWrapper ];
 
   preCheck = ''
-    export RUST_SRC;_PATH="${rustPlatform.rust.rustc.src}/src"
+    export RUST_SRC_PATH="${rustPlatform.rust.rustc.src}/src"
   '';
 
+  doCheck = true;
+
   installPhase = ''
     mkdir -p $out/bin
     cp -p target/release/racer $out/bin/