diff --git a/CMakeLists.txt b/CMakeLists.txt
index af17bac..40c8345 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -237,12 +237,13 @@ else()
         OUTPUT_VARIABLE RUST_LIBDIR
         OUTPUT_STRIP_TRAILING_WHITESPACE
     )
-    if(NOT IS_DIRECTORY ${RUST_LIBDIR})
+    if(NOT ${RUST_LIBDIR} OR NOT IS_DIRECTORY ${RUST_LIBDIR})
         message(WARNING "Rust toolchain for \"${RUST_TARGET}\" not found. Rust code skipped.")
         set(SKIP_RUST ON)
     endif()
 endif()
 if(NOT SKIP_RUST)
+    message(INFO "Rust tools found at ${RUSTC}, ${CARGO}, ${RUST_LIBDIR}")
     ExternalProject_Add(avsrs
         DEPENDS libavs
         SOURCE_DIR "${CMAKE_SOURCE_DIR}"