diff --git a/pkgs/by-name/sl/slippy/package.nix b/pkgs/by-name/sl/slippy/package.nix
index 29ac95bfb9c8..70e757d7c1a1 100644
--- a/pkgs/by-name/sl/slippy/package.nix
+++ b/pkgs/by-name/sl/slippy/package.nix
@@ -2,8 +2,6 @@
   lib,
   rustPlatform,
   fetchFromGitHub,
-  jq,
-  moreutils,
   pkg-config,
   openssl,
   stdenv,
@@ -21,28 +19,8 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-7Uvo5+saxwTMQjfDliyOYC6j6LbpMf/FiONfX38xepI=";
   };
 
-  cargoHash = "sha256-6nB+rHBJU9qhA7azz2ynaBw1UJdwE+T7pgpoPzhD5Bk=";
-
-  # the dependency css-minify contains both README.md and Readme.md,
-  # which causes a hash mismatch on systems with a case-insensitive filesystem
-  # this removes the readme files and updates cargo's checksum file accordingly
-  depsExtraArgs = {
-    nativeBuildInputs = [
-      jq
-      moreutils
-    ];
-
-    postBuild = ''
-      pushd $name/css-minify
-
-      rm -f README.md Readme.md
-      jq 'del(.files."README.md") | del(.files."Readme.md")' \
-        .cargo-checksum.json -c \
-        | sponge .cargo-checksum.json
-
-      popd
-    '';
-  };
+  useFetchCargoVendor = true;
+  cargoHash = "sha256-RGSc+jy2i97QZGfafe3M25bunBmCYAJ0UW3dAnvl5gs=";
 
   nativeBuildInputs = [
     pkg-config