diff --git a/pkgs/development/tools/ttfb/default.nix b/pkgs/development/tools/ttfb/default.nix
index a3b8898eacf4..abfc5440734c 100644
--- a/pkgs/development/tools/ttfb/default.nix
+++ b/pkgs/development/tools/ttfb/default.nix
@@ -13,10 +13,10 @@ rustPlatform.buildRustPackage rec {
 
   src = fetchCrate {
     inherit pname version;
-    sha256 = "sha256-o7kzQ8jtAqDwTUPtjeNqgotxREeWl7jQG+EDrYWJL/Q=";
+    hash = "sha256-o7kzQ8jtAqDwTUPtjeNqgotxREeWl7jQG+EDrYWJL/Q=";
   };
 
-  cargoSha256 = "sha256-ayyYrrFDVOYVjVo5TLaRn2mvmywe5BjQ7kRVV2r0iK8=";
+  cargoHash = "sha256-ayyYrrFDVOYVjVo5TLaRn2mvmywe5BjQ7kRVV2r0iK8=";
 
   # The bin feature activates all dependencies of the binary. Otherwise,
   # only the library is build.
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     darwin.apple_sdk.frameworks.Security
   ];
 
-  meta = with lib; {
+  meta = {
     description = "CLI-Tool to measure the TTFB (time to first byte) of HTTP(S) requests";
     longDescription = ''
       This crate measures the times of DNS lookup, TCP connect, TLS handshake, and HTTP's TTFB
@@ -38,8 +38,8 @@ rustPlatform.buildRustPackage rec {
     '';
     homepage = "https://github.com/phip1611/ttfb";
     changelog = "https://github.com/phip1611/ttfb/blob/v${version}/CHANGELOG.md";
-    license = with licenses; [ mit ];
-    maintainers = with maintainers; [ phip1611 ];
+    license = with lib.licenses; [ mit ];
+    maintainers = with lib.maintainers; [ phip1611 ];
   };
 }