3 files changed, 5 insertions, 5 deletions
diff --git a/include/NeBuildKit/IManifestBuilder.h b/include/NeBuildKit/IManifestBuilder.h
index c42f257..8223506 100644
--- a/include/NeBuildKit/IManifestBuilder.h
+++ b/include/NeBuildKit/IManifestBuilder.h
@@ -8,7 +8,7 @@
 #include <NeBuildKit/Detail/Config.h>
 #include <string_view>
 
-#define NEBUILD_MANIFEST_BUILDER : public ::NeBuild::IManifestBuilder
+#define NEBUILD_MANIFEST_BUILDER final : public ::NeBuild::IManifestBuilder
 
 namespace NeBuild {
 /// =========================================================== ///
@@ -29,11 +29,11 @@ class IManifestBuilder {
   /// @retval true building has succeeded.
   /// @retval false fail to build, see error message.
   /// =========================================================== ///
-  virtual bool BuildTarget(BuildConfig& config) = 0;
+  virtual bool BuildTarget(BuildConfig& config) { return false; }
 
   /// =========================================================== ///
   /// @brief Returns the build system name.
   /// =========================================================== ///
-  virtual const std::string_view BuildSystem() = 0;
+  virtual const std::string_view BuildSystem() { return "(null)"; }
 };
 }  // namespace NeBuild
 \ No newline at end of file
diff --git a/include/NeBuildKit/JSONManifestBuilder.h b/include/NeBuildKit/JSONManifestBuilder.h
index 9f1afdc..4f3cec5 100644
--- a/include/NeBuildKit/JSONManifestBuilder.h
+++ b/include/NeBuildKit/JSONManifestBuilder.h
@@ -12,7 +12,7 @@
 
 namespace NeBuild {
 /// @brief JSON builder
-class JSONManifestBuilder final NEBUILD_MANIFEST_BUILDER {
+class JSONManifestBuilder NEBUILD_MANIFEST_BUILDER {
  public:
   JSONManifestBuilder()           = default;
   ~JSONManifestBuilder() override = default;
diff --git a/include/NeBuildKit/TOMLManifestBuilder.h b/include/NeBuildKit/TOMLManifestBuilder.h
index 1c6bb1b..b4d61b8 100644
--- a/include/NeBuildKit/TOMLManifestBuilder.h
+++ b/include/NeBuildKit/TOMLManifestBuilder.h
@@ -12,7 +12,7 @@
 
 namespace NeBuild {
 /// @brief TOML builder
-class TOMLManifestBuilder final NEBUILD_MANIFEST_BUILDER {
+class TOMLManifestBuilder NEBUILD_MANIFEST_BUILDER {
  public:
   TOMLManifestBuilder()           = default;
   ~TOMLManifestBuilder() override = default;