diff --git a/nix/shell.nix b/nix/shell.nix
index 965a0eb..f809a12 100644
--- a/nix/shell.nix
+++ b/nix/shell.nix
@@ -4,6 +4,8 @@
   rustfmt,
   clippy,
   cargo,
+  cargo-machete,
+  cargo-nextest,
   rustPlatform,
 }:
 mkShell {
@@ -13,6 +15,8 @@ mkShell {
     rustfmt
     clippy
     cargo
+    cargo-machete
+    cargo-nextest
   ];
 
   RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";