diff --git a/cmake/Rust.cmake b/cmake/Rust.cmake
index 3ec5482e6..99ceb6b6c 100644
--- a/cmake/Rust.cmake
+++ b/cmake/Rust.cmake
@@ -37,7 +37,8 @@ if(DEFINED ASAN)
 endif()
 
 corrosion_import_crate(
-    MANIFEST_PATH "${CMAKE_SOURCE_DIR}/fish-rust/Cargo.toml"
+    MANIFEST_PATH "${CMAKE_SOURCE_DIR}/Cargo.toml"
+    CRATES "fish-rust"
     FEATURES "${FISH_CRATE_FEATURES}"
     FLAGS "${CARGO_FLAGS}"
 )
diff --git a/cmake/Tests.cmake b/cmake/Tests.cmake
index 5e900741e..4061a6b20 100644
--- a/cmake/Tests.cmake
+++ b/cmake/Tests.cmake
@@ -193,8 +193,8 @@ endif()
 if(NOT DEFINED ASAN)
     add_test(
         NAME "cargo-test"
-        COMMAND cargo test ${CARGO_FLAGS} --target-dir target ${cargo_target_opt}
-        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}/fish-rust"
+        COMMAND cargo test ${CARGO_FLAGS} --package fish-rust --target-dir target ${cargo_target_opt}
+        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
     )
     set_tests_properties("cargo-test" PROPERTIES SKIP_RETURN_CODE ${SKIP_RETURN_CODE})
     add_test_target("cargo-test")
@@ -202,7 +202,7 @@ endif()
 
 add_test(
     NAME "cargo-test-widestring"
-    COMMAND cargo test ${CARGO_FLAGS} --target-dir target ${cargo_target_opt}
-    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}/fish-rust/widestring-suffix/"
+    COMMAND cargo test ${CARGO_FLAGS} --package widestring-suffix --target-dir target ${cargo_target_opt}
+    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
 )
 add_test_target("cargo-test-widestring")
diff --git a/fish-rust/build.rs b/fish-rust/build.rs
index 507db90e1..06335c826 100644
--- a/fish-rust/build.rs
+++ b/fish-rust/build.rs
@@ -6,7 +6,7 @@ fn main() {
 
     let rust_dir = std::env::var("CARGO_MANIFEST_DIR").expect("Env var CARGO_MANIFEST_DIR missing");
     let target_dir =
-        std::env::var("FISH_RUST_TARGET_DIR").unwrap_or(format!("{}/{}", rust_dir, "target/"));
+        std::env::var("FISH_RUST_TARGET_DIR").unwrap_or(format!("{}/../{}", rust_dir, "target/"));
     let fish_src_dir = format!("{}/{}", rust_dir, "../src/");
 
     // Where cxx emits its header.