diff --git a/config/mruby/build_config.rb b/config/mruby/build_config.rb
new file mode 100644
index 0000000..c44d094
--- /dev/null
+++ b/config/mruby/build_config.rb
@@ -0,0 +1,19 @@
+# check for flags here:
+#  default configuration: https://github.com/mruby/mruby/blob/master/build_config/default.rb
+#  compilation guide: https://github.com/mruby/mruby/blob/master/doc/guides/compile.md
+
+MRuby::Build.new do |conf|
+  conf.toolchain
+
+  # our gems
+  conf.gem '../../mrbgems/core'
+  conf.gem '../../mrbgems/oneshot'
+  conf.gem '../../mrbgems/sunshine' # :3
+
+  # core gems
+  conf.gem :core => 'mruby-bin-config' # mruby-config would be used in CMakeLists.txt
+
+  if ENV.include?('DEBUG')
+    conf.enable_debug
+  end
+end
diff --git a/mrbgems/core/mrbgem.rake b/mrbgems/core/mrbgem.rake
new file mode 100644
index 0000000..caed034
--- /dev/null
+++ b/mrbgems/core/mrbgem.rake
@@ -0,0 +1,6 @@
+MRuby::Gem::Specification.new('core') do |spec|
+  spec.license = 'GPLv2'
+  spec.summary = "Bindings for MKXP engine itself"
+
+  spec.objs = Dir.glob("#{dir}/src/*.{c,cpp,m,asm,S}").map { |f| objfile(f.relative_path_from(dir).pathmap("#{build_dir}/%X")) }
+end
diff --git a/mrbgems/core/src/README.md b/mrbgems/core/src/README.md
new file mode 100644
index 0000000..c889a5d
--- /dev/null
+++ b/mrbgems/core/src/README.md
@@ -0,0 +1 @@
+nothing here for now
\ No newline at end of file
diff --git a/mrbgems/oneshot/mrbgem.rake b/mrbgems/oneshot/mrbgem.rake
new file mode 100644
index 0000000..28923e7
--- /dev/null
+++ b/mrbgems/oneshot/mrbgem.rake
@@ -0,0 +1,6 @@
+MRuby::Gem::Specification.new('oneshot') do |spec|
+  spec.license = 'GPLv2'
+  spec.summary = "Bindings for OneShot"
+
+  spec.objs = Dir.glob("#{dir}/src/*.{c,cpp,m,asm,S}").map { |f| objfile(f.relative_path_from(dir).pathmap("#{build_dir}/%X")) }
+end
diff --git a/mrbgems/oneshot/src/README.md b/mrbgems/oneshot/src/README.md
new file mode 100644
index 0000000..c889a5d
--- /dev/null
+++ b/mrbgems/oneshot/src/README.md
@@ -0,0 +1 @@
+nothing here for now
\ No newline at end of file
diff --git a/mrbgems/sunshine/mrbgem.rake b/mrbgems/sunshine/mrbgem.rake
new file mode 100644
index 0000000..17a0e0c
--- /dev/null
+++ b/mrbgems/sunshine/mrbgem.rake
@@ -0,0 +1,6 @@
+MRuby::Gem::Specification.new('sunshine') do |spec|
+  spec.license = 'GPLv2'
+  spec.summary = "Bindings for Oneshot: Sunshine"
+
+  spec.objs = Dir.glob("#{dir}/src/*.{c,cpp,m,asm,S}").map { |f| objfile(f.relative_path_from(dir).pathmap("#{build_dir}/%X")) }
+end
diff --git a/mrbgems/sunshine/src/README.md b/mrbgems/sunshine/src/README.md
new file mode 100644
index 0000000..c889a5d
--- /dev/null
+++ b/mrbgems/sunshine/src/README.md
@@ -0,0 +1 @@
+nothing here for now
\ No newline at end of file