diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 06b9daf..37b5c5a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -18,10 +18,10 @@ if("${CMAKE_VERSION}" VERSION_GREATER_EQUAL "3.31")
 endif()
 
 add_custom_command(
-	OUTPUT ${impl_basename}.a
-	COMMAND env CARGO_TARGET_DIR=${CARGO_TARGET_DIR} ${CARGO} build --release --package PROJECT-NAME
-	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-	DEPFILE ${impl_basename}.d
+	OUTPUT "${impl_basename}.a"
+	COMMAND env "CARGO_TARGET_DIR=${CARGO_TARGET_DIR}" ${CARGO} build --release --package PROJECT-NAME
+	WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+	DEPFILE "${impl_basename}.d"
 	USES_TERMINAL
 	VERBATIM
 	${cargo_cmake_args}
@@ -29,13 +29,13 @@ add_custom_command(
 
 # HACK ensure CMake *actually adds* the command above
 add_custom_target(build_impl
-	DEPENDS ${impl_basename}.a
+	DEPENDS "${impl_basename}.a"
 )
 
 add_library(PROJECT_NAME_impl STATIC IMPORTED GLOBAL)
 
 set_target_properties(PROJECT_NAME_impl PROPERTIES
-	IMPORTED_LOCATION ${impl_basename}.a
+	IMPORTED_LOCATION "${impl_basename}.a"
 )
 
 # generate the bindings