diff --git a/pkgs/development/compilers/rust/binary.nix b/pkgs/development/compilers/rust/binary.nix
index ce4250f675e9..1145f4da8f66 100644
--- a/pkgs/development/compilers/rust/binary.nix
+++ b/pkgs/development/compilers/rust/binary.nix
@@ -19,7 +19,7 @@ in
 
 rec {
   rustc = stdenv.mkDerivation {
-    name = "rustc-${versionType}-${version}";
+    pname = "rustc-${versionType}";
 
     inherit version;
     inherit src;
@@ -71,7 +71,7 @@ rec {
   };
 
   cargo = stdenv.mkDerivation {
-    name = "cargo-${versionType}-${version}";
+    pname = "cargo-${versionType}";
 
     inherit version;
     inherit src;