diff --git a/tools/build_api.py b/tools/build_api.py
index 478353e398..e3247b37fc 100644
--- a/tools/build_api.py
+++ b/tools/build_api.py
@@ -236,8 +236,10 @@ def build_project(src_path, build_path, target, toolchain_name,
         toolchain.add_macros(config.get_config_data_macros())
 
         # Compile Sources
-        objects = toolchain.compile_sources(resources, build_path, resources.inc_dirs)
-        resources.objects.extend(objects)
+        for path in src_paths:
+            src = toolchain.scan_resources(path)
+            objects = toolchain.compile_sources(src, build_path, resources.inc_dirs)
+            resources.objects.extend(objects)
 
         # Link Program
         res, _ = toolchain.link_program(resources, build_path, name)
@@ -402,8 +404,10 @@ def build_library(src_paths, build_path, target, toolchain_name,
         toolchain.add_macros(config.get_config_data_macros())
 
         # Compile Sources
-        objects = toolchain.compile_sources(resources, build_path, resources.inc_dirs)
-        resources.objects.extend(objects)
+        for path in src_paths:
+            src = toolchain.scan_resources(path)
+            objects = toolchain.compile_sources(src, abspath(tmp_path), resources.inc_dirs)
+            resources.objects.extend(objects)
 
         if archive:
             toolchain.build_library(objects, build_path, name)