diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..6057818
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,18 @@
+Copyright 2023-2023 Alex Yatskov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/cmd/.gitignore b/cmd/.gitignore
new file mode 100644
index 0000000..378eac2
--- /dev/null
+++ b/cmd/.gitignore
@@ -0,0 +1 @@
+build
diff --git a/cmd/Makefile b/cmd/Makefile
new file mode 100644
index 0000000..c28b1d4
--- /dev/null
+++ b/cmd/Makefile
@@ -0,0 +1,50 @@
+appname := mex
+sources := $(wildcard *.go)
+
+build = GOOS=$(1) GOARCH=$(2) go build -o build/$(appname)$(3)
+tar = cd build && tar -cvzf $(appname)_$(1)_$(2).tar.gz $(appname)$(3) && rm $(appname)$(3)
+zip = cd build && zip $(appname)_$(1)_$(2).zip $(appname)$(3) && rm $(appname)$(3)
+
+.PHONY: all windows darwin linux clean
+
+all: windows darwin linux
+
+clean:
+	rm -rf build/
+
+# linux builds
+linux: build/$(appname)_linux_arm.tar.gz build/$(appname)_linux_arm64.tar.gz build/$(appname)_linux_386.tar.gz build/$(appname)_linux_amd64.tar.gz
+
+build/$(appname)_linux_386.tar.gz: $(sources)
+	$(call build,linux,386,)
+	$(call tar,linux,386)
+
+build/$(appname)_linux_amd64.tar.gz: $(sources)
+	$(call build,linux,amd64,)
+	$(call tar,linux,amd64)
+
+build/$(appname)_linux_arm.tar.gz: $(sources)
+	$(call build,linux,arm,)
+	$(call tar,linux,arm)
+
+build/$(appname)_linux_arm64.tar.gz: $(sources)
+	$(call build,linux,arm64,)
+	$(call tar,linux,arm64)
+
+# darwin builds
+darwin: build/$(appname)_darwin_amd64.tar.gz
+
+build/$(appname)_darwin_amd64.tar.gz: $(sources)
+	$(call build,darwin,amd64,)
+	$(call tar,darwin,amd64)
+
+# windows builds
+windows: build/$(appname)_windows_386.zip build/$(appname)_windows_amd64.zip
+
+build/$(appname)_windows_386.zip: $(sources)
+	$(call build,windows,386,.exe)
+	$(call zip,windows,386,.exe)
+
+build/$(appname)_windows_amd64.zip: $(sources)
+	$(call build,windows,amd64,.exe)
+	$(call zip,windows,amd64,.exe)