diff --git a/pkgs/development/tools/rbspy/default.nix b/pkgs/development/tools/rbspy/default.nix
index 37ca9667833b..4a61021a00ca 100644
--- a/pkgs/development/tools/rbspy/default.nix
+++ b/pkgs/development/tools/rbspy/default.nix
@@ -10,16 +10,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "rbspy";
-  version = "0.27.0";
+  version = "0.28.0";
 
   src = fetchFromGitHub {
     owner = "rbspy";
     repo = "rbspy";
     tag = "v${version}";
-    hash = "sha256-K5zDM7HhSNklCMoj3yh5lf0HTITOl2UYXW0QCxDF2GU=";
+    hash = "sha256-6tCTrplzoiimKvXEIXd2gUOXzcZ/eQ22npBqbVv0Nv0=";
   };
 
-  cargoHash = "sha256-2yYv7Pp6UqHTPrmG4BM0py3GoPYYJW7e9LQSrgxx/3A=";
+  cargoHash = "sha256-J+3v7O38+MhCoq1UKf0Sqaomw/SSu+JK3sWWv9rB6FI=";
 
   # error: linker `aarch64-linux-gnu-gcc` not found
   postPatch = ''
@@ -35,6 +35,8 @@ rustPlatform.buildRustPackage rec {
       --replace /usr/bin/which '${which}/bin/which'
     substituteInPlace src/sampler/mod.rs \
       --replace /usr/bin/which '${which}/bin/which'
+    substituteInPlace src/core/ruby_spy.rs \
+      --replace /usr/bin/ruby '${ruby}/bin/ruby'
   '';
 
   checkFlags = [
@@ -45,10 +47,12 @@ rustPlatform.buildRustPackage rec {
     "--skip=test_sample_subprocesses"
   ];
 
-  nativeBuildInputs = [
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin rustPlatform.bindgenHook;
+
+  nativeCheckInputs = [
     ruby
     which
-  ] ++ lib.optional stdenv.hostPlatform.isDarwin rustPlatform.bindgenHook;
+  ];
 
   passthru.updateScript = nix-update-script { };