diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d8e21f..1246170 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,11 +27,10 @@ pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET "glib-2.0>=2.43.4")
 link_libraries(PkgConfig::GTK3 PkgConfig::GLIB)
 
 # Build
-add_custom_command(
-    OUTPUT ".gresource.c"
+add_custom_command(OUTPUT "${CMAKE_CURRENT_SOURCE_DIR}/.gresource.c"
     COMMAND glib-compile-resources
     ARGS "--target" "${CMAKE_CURRENT_BINARY_DIR}/.gresource.c" "--generate-source" "--sourcedir" "${CMAKE_CURRENT_SOURCE_DIR}/src" "${CMAKE_CURRENT_SOURCE_DIR}/src/.gresource.xml"
-    DEPENDS "src/.gresource.xml" "src/zenity.ui"
+    DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/.gresource.xml" "${CMAKE_CURRENT_SOURCE_DIR}/src/zenity.ui"
 )
 add_executable(zenity src/entry.c src/tree.c src/option.c src/text.c src/util.c src/main.c "${CMAKE_CURRENT_BINARY_DIR}/.gresource.c")
 target_compile_definitions(zenity PRIVATE "-DG_LOG_DOMAIN=\"Zenity\"")