diff --git a/nix/shell.nix b/nix/shell.nix
index 4eb0fe6f..bdf745b9 100644
--- a/nix/shell.nix
+++ b/nix/shell.nix
@@ -144,11 +144,11 @@ let
         pass_filenames = false;
       };
 
-      # Rust formatting and linting
+      # Rust formatting and linting (project lives in rust/prop_grid_rs/)
       cargo-fmt = {
         enable = true;
         name = "cargo fmt";
-        entry = "cargo fmt --all --check";
+        entry = "cargo fmt --manifest-path rust/prop_grid_rs/Cargo.toml --all --check";
         files = "\\.rs$";
         pass_filenames = false;
       };
@@ -156,7 +156,7 @@ let
       cargo-clippy = {
         enable = true;
         name = "cargo clippy";
-        entry = "cargo clippy --all-targets -- -D warnings";
+        entry = "cargo clippy --manifest-path rust/prop_grid_rs/Cargo.toml --all-targets -- -D warnings";
         files = "\\.rs$";
         pass_filenames = false;
       };