no fucking idea. was on the plane. project runs, tests pass.

flake.nix

@@ -43,10 +43,6 @@
                          cargo-tarpaulin
                          deno];
           RUST_SRC_PATH = rustPlatform.rustLibSrc;
-          shellHook = ''
-            export PROJECT_ROOT=${PROJECT_ROOT};
-            export PATH=$PROJECT_ROOT/tools:$PATH;
-          '';
         };
       });
 }