diff --git a/Earthfile b/Earthfile
index 825b827..2728bb4 100644
--- a/Earthfile
+++ b/Earthfile
@@ -46,7 +46,7 @@ base-frontend:
 
 upend-bin:
   FROM +base-backend
-  CACHE target
+  CACHE --id=rust-target target
   RUN cargo build --release
   COPY +git-version/version.txt .
   RUN UPEND_VERSION=$(cat version.txt) cargo build --release
@@ -152,6 +152,7 @@ lint:
 
 lint-backend:
   FROM +base-backend
+  CACHE --id=rust-target target
   RUN cargo clippy --workspace
 
 lint-frontend:
@@ -171,6 +172,7 @@ audit:
 
 audit-backend:
   FROM +base-backend
+  CACHE --id=rust-target target
   RUN cargo audit --workspace
 
 audit-frontend:
@@ -185,6 +187,7 @@ test:
 
 test-backend:
   FROM +base-backend
+  CACHE --id=rust-target target
   RUN cargo nextest run --workspace
 
 test-jslib: