diff --git a/flake.nix b/flake.nix
index 294023fe..1c7ed256 100644
--- a/flake.nix
+++ b/flake.nix
@@ -103,6 +103,7 @@
               (craneLib.fileset.commonCargoSources ./parakeet)
               (craneLib.fileset.commonCargoSources ./parakeet-db)
               (craneLib.fileset.commonCargoSources ./parakeet-index)
+              ./parakeet-index/proto
               (craneLib.fileset.commonCargoSources ./parakeet-lexgen)
               (craneLib.fileset.commonCargoSources crate)
             ];
diff --git a/parakeet-index/build.rs b/parakeet-index/build.rs
index ec77e8a7..52c95e1f 100644
--- a/parakeet-index/build.rs
+++ b/parakeet-index/build.rs
@@ -1,5 +1,8 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    tonic_build::configure().compile_protos(&["proto/parakeet.proto"], &[""])?;
+    tonic_build::configure().compile_protos(
+        &[std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("proto/parakeet.proto")],
+        &[std::path::Path::new(env!("CARGO_MANIFEST_DIR"))],
+    )?;
 
     Ok(())
 }