feat: add rperf package

flake.nix

@@ -79,6 +79,11 @@
       flake = false;
     };
 
+    rperf = {
+      url = "github:steveej-forks/rperf";
+      flake = false;
+    };
+
     ### inputs for thinkpad x13s
     # see https://github.com/jhovold/linux/wiki/X13s for status updates
     linux_x13s.url = "github:jhovold/linux/wip/sc8280xp-v6.7";
@@ -307,6 +312,15 @@
             (lib.attrsets.optionalAttrs pkgs.stdenv.isAarch64 {
               overrideSrc = self.inputs.logseq_0_10_5_aarch64_appimage;
             });
+
+            rperf = craneLib.buildPackage {
+            src = inputs.rperf;
+            nativeBuildInputs = [
+              pkgs.pkg-config
+            ];
+            buildInputs = [
+            ];
+          };
         };
 
         formatter = pkgs.alejandra;