diff --git a/pkgs/development/tools/rust/racer/default.nix b/pkgs/development/tools/rust/racer/default.nix
index 86f1989729e..7de30855dd3 100644
--- a/pkgs/development/tools/rust/racer/default.nix
+++ b/pkgs/development/tools/rust/racer/default.nix
@@ -2,16 +2,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "racer";
-  version = "2.1.35";
+  version = "2.1.40";
 
   src = fetchFromGitHub {
     owner = "racer-rust";
     repo = "racer";
     rev = "v${version}";
-    sha256 = "0c00b81s7abnadjbf4i39lhdkipx7z44sr8p78jd1fl61yyrspli";
+    sha256 = "sha256-8Is+RBfcXKbGSFzYoolLHs30rxlNI//xVGEOhxP2TV8=";
   };
 
-  cargoSha256 = "1nbp2jp65fqwsq9i04iyi4pbszs035w6id50p5ypw234cqxznikm";
+  cargoSha256 = "sha256-iUomr9viCdZk4nV75/OP8vHtJpMbmy+pq1IbaA2lLmE=";
 
   nativeBuildInputs = [ makeWrapper ];
   buildInputs = stdenv.lib.optional stdenv.isDarwin Security;
@@ -19,21 +19,20 @@ rustPlatform.buildRustPackage rec {
   # a nightly compiler is required unless we use this cheat code.
   RUSTC_BOOTSTRAP = 1;
 
-  RUST_SRC_PATH = rustPlatform.rustcSrc;
+  RUST_SRC_PATH = rustPlatform.rustLibSrc;
   postInstall = ''
-    wrapProgram $out/bin/racer --set-default RUST_SRC_PATH ${rustPlatform.rustcSrc}
+    wrapProgram $out/bin/racer --set-default RUST_SRC_PATH ${rustPlatform.rustLibSrc}
   '';
 
-  checkPhase = ''
-    cargo test -- \
-      --skip nameres::test_do_file_search_std \
-      --skip util::test_get_rust_src_path_rustup_ok \
-      --skip util::test_get_rust_src_path_not_rust_source_tree \
-      --skip extern --skip completes_pub_fn --skip find_crate_doc \
-      --skip follows_use_local_package --skip follows_use_for_reexport \
-      --skip follows_rand_crate --skip get_completion_in_example_dir \
-      --skip test_resolve_global_path_in_modules
-  '';
+  checkFlags = [
+    "--skip nameres::test_do_file_search_std"
+    "--skip util::test_get_rust_src_path_rustup_ok"
+    "--skip util::test_get_rust_src_path_not_rust_source_tree"
+    "--skip extern --skip completes_pub_fn --skip find_crate_doc"
+    "--skip follows_use_local_package --skip follows_use_for_reexport"
+    "--skip follows_rand_crate --skip get_completion_in_example_dir"
+    "--skip test_resolve_global_path_in_modules"
+  ];
 
   doInstallCheck = true;
   installCheckPhase = ''