diff --git a/pkgs/build-support/rust/default.nix b/pkgs/build-support/rust/default.nix
index 8265fff2c61c..fb1d6e390ae1 100644
--- a/pkgs/build-support/rust/default.nix
+++ b/pkgs/build-support/rust/default.nix
@@ -7,7 +7,6 @@ in
 { name, cargoSha256 ? "unset"
 , src ? null
 , srcs ? null
-, patches ? []
 , sourceRoot ? null
 , logLevel ? ""
 , buildInputs ? []
@@ -23,7 +22,7 @@ assert cargoVendorDir == null -> cargoSha256 != "unset";
 let
   cargoDeps = if cargoVendorDir == null
     then fetchcargo {
-        inherit name src srcs patches sourceRoot cargoUpdateHook;
+        inherit name src srcs sourceRoot cargoUpdateHook;
         sha256 = cargoSha256;
       }
     else null;
diff --git a/pkgs/build-support/rust/fetchcargo.nix b/pkgs/build-support/rust/fetchcargo.nix
index 2670ed528640..42a3ac27cb5b 100644
--- a/pkgs/build-support/rust/fetchcargo.nix
+++ b/pkgs/build-support/rust/fetchcargo.nix
@@ -1,11 +1,11 @@
 { stdenv, cacert, git, rust, cargo-vendor }:
-{ name ? "cargo-deps", src, srcs, patches, sourceRoot, sha256, cargoUpdateHook ? "" }:
+{ name ? "cargo-deps", src, srcs, sourceRoot, sha256, cargoUpdateHook ? "" }:
 stdenv.mkDerivation {
   name = "${name}-vendor";
   nativeBuildInputs = [ cacert cargo-vendor git rust.cargo ];
-  inherit src srcs patches sourceRoot;
+  inherit src srcs sourceRoot;
 
-  phases = "unpackPhase patchPhase installPhase";
+  phases = "unpackPhase installPhase";
 
   installPhase = ''
     if [[ ! -f Cargo.lock ]]; then