diff --git a/applications/devel-rust.nix b/applications/devel-rust.nix
index 9554f2f..440abf0 100644
--- a/applications/devel-rust.nix
+++ b/applications/devel-rust.nix
@@ -21,5 +21,7 @@
     cargo-expand # Dump expanded macros
     unstable.cargo-tarpaulin # Code coverage
     cargo-play # Quickly execute code outside of a crate
+    # For building stuff that uses protocol buffers
+    protobuf
   ];
 }