remove tarpaulin as it's broken

flake.nix

@@ -9,9 +9,14 @@
     };
   };
 
-  outputs = { self, nixpkgs, utils, naersk, flake-compat }:
-    utils.lib.eachDefaultSystem (system:
-      let
+  outputs = {
+    self,
+    nixpkgs,
+    utils,
+    naersk,
+    flake-compat,
+  }:
+    utils.lib.eachDefaultSystem (system: let
       pkgs = nixpkgs.legacyPackages."${system}";
       naersk-lib = naersk.lib."${system}";
     in rec {
@@ -34,7 +39,6 @@
           cargo-edit
           cargo-outdated
           cargo-release
-            cargo-tarpaulin
           cargo-watch
           clippy
           git
@@ -46,8 +50,7 @@
           rustc
           rustfmt
         ];
-          RUST_SRC_PATH =
-            "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+        RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
       };
     });
 }