diff --git a/tools/build_script_generator/make/resources/config.mk.in b/tools/build_script_generator/make/resources/config.mk.in
index 3da36a6f4d..6e91cbe065 100644
--- a/tools/build_script_generator/make/resources/config.mk.in
+++ b/tools/build_script_generator/make/resources/config.mk.in
@@ -57,6 +57,7 @@ APP_SRC := $(APP_SRC:./%=%)
 %% for repo in generated_paths
 APP_SRC := $(filter-out {{repo}}/%,$(APP_SRC))
 %% endfor
+CPPDEFINES += -I.
 %% if options["::info.git"] != "Disabled"
 %#
 # Git information
diff --git a/tools/build_script_generator/scons/resources/SConstruct.in b/tools/build_script_generator/scons/resources/SConstruct.in
index 93b9ea4589..d6af31feda 100644
--- a/tools/build_script_generator/scons/resources/SConstruct.in
+++ b/tools/build_script_generator/scons/resources/SConstruct.in
@@ -29,7 +29,7 @@ env.Alias("library", libraries)
 headers = env.FindHeaderFiles("{{ unittest_source }}")
 sources = [env.UnittestRunner(target="unittest_runner.cpp", source=headers)]
 %% else
-env.Append(CPPPATH=".")
+env.Append(CPPPATH=abspath("."))
 ignored = [".lbuild_cache", env["CONFIG_BUILD_BASE"]] + generated_paths
 sources = []
 %% endif