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-rw-r--r--tvix/castore/build.rs2
-rw-r--r--tvix/castore/protos/default.nix18
2 files changed, 7 insertions, 13 deletions
diff --git a/tvix/castore/build.rs b/tvix/castore/build.rs
index 98e2ab348528..a4591c845509 100644
--- a/tvix/castore/build.rs
+++ b/tvix/castore/build.rs
@@ -26,7 +26,7 @@ fn main() -> Result<()> {
             ],
             // If we are in running `cargo build` manually, using `../..` works fine,
             // but in case we run inside a nix build, we need to instead point PROTO_ROOT
-            // to a sparseTree containing that structure.
+            // to a custom tree containing that structure.
             &[match std::env::var_os("PROTO_ROOT") {
                 Some(proto_root) => proto_root.to_str().unwrap().to_owned(),
                 None => "../..".to_string(),
diff --git a/tvix/castore/protos/default.nix b/tvix/castore/protos/default.nix
index feef55690fb9..08bb8fcfeef1 100644
--- a/tvix/castore/protos/default.nix
+++ b/tvix/castore/protos/default.nix
@@ -1,16 +1,10 @@
-{ depot, pkgs, ... }:
+{ depot, pkgs, lib, ... }:
 let
-  protos = depot.nix.sparseTree {
-    name = "castore-protos";
-    root = depot.path.origSrc;
-    paths = [
-      ./castore.proto
-      ./rpc_blobstore.proto
-      ./rpc_directory.proto
-      ../../../buf.yaml
-      ../../../buf.gen.yaml
-    ];
-  };
+  protos = lib.sourceByRegex depot.path.origSrc [
+    "buf.yaml"
+    "buf.gen.yaml"
+    "^tvix(/castore(/protos(/.*\.proto)?)?)?$"
+  ];
 in
 depot.nix.readTree.drvTargets {
   inherit protos;