diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1cf6759
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,74 @@
+VERSION:=$(shell if [ -d .git ]; then bash -c 'gitversion.sh | grep "^MAJOR=" | cut -d = -f 2'; else source version.sh && echo $$MAJOR ; fi)
+RELEASE:=$(shell if [ -d .git ]; then bash -c 'gitversion.sh | grep "^BUILD=" | cut -d = -f 2'; else source version.sh && echo $$BUILD ; fi)
+DISTFILE=./dist/cmdarg-$(VERSION)-$(RELEASE).tar.gz
+SPECFILE=cmdarg.spec
+SRPM=cmdarg-$(VERSION)-$(RELEASE).src.rpm
+ifndef RHEL_VERSION
+	RHEL_VERSION=5
+endif
+RPM=cmdarg-$(VERSION)-$(RELEASE).noarch.rpm
+
+ifndef PREFIX
+	PREFIX=/
+endif
+
+DISTFILE_DEPS=$(shell find . -type f | grep -Ev '\.git|\./dist/|$(DISTFILE)')
+
+all: ./dist/$(RPM)
+
+# --- PHONY targets
+
+.PHONY: clean srpm rpm gitclean dist
+clean:
+	rm -f $(DISTFILE)
+	rm -fr dist/cmdarg-$(VERSION)-$(RELEASE)*
+
+dist: $(DISTFILE)
+
+srpm: ./dist/$(SRPM)
+
+rpm: ./dist/$(RPM) ./dist/$(SRPM)
+
+gitclean:
+	git clean -df
+
+# --- End phony targets
+
+# This was borrowed from distiller, and I think it's to prevent version.sh
+# from updating unnecessarily
+version.sh:
+	if [ ! -d .git ] && [ -f version.sh ]; then echo "No git, keeping old version.sh" ; fi ; \
+	if [ ! -d .git ] && [ ! -f version.sh ]; then echo "No git and no version.sh, you're boned"; exit 1; fi ; \
+	if [ -d .git ] ; then \
+		bash ./gitversion.sh > tmpversion.sh && \
+		VERSIONSHA=$$(openssl sha1 version.sh | cut -d = -f 2) ; \
+		TMPVERSIONSHA=$$(openssl sha1 tmpversion.sh | cut -d = -f 2) ; \
+		if [ ! -e version.sh ] || [ "$$VERSIONSHA" != "$$TMPVERSIONSHA" ]; then \
+			mv tmpversion.sh version.sh; \
+		fi; \
+	fi
+
+$(DISTFILE): version.sh
+	mkdir -p dist/
+	mkdir dist/cmdarg-$(VERSION)-$(RELEASE) || rm -fr dist/cmdarg-$(VERSION)-$(RELEASE)
+	rsync -aWH . --exclude=.git --exclude=dist ./dist/cmdarg-$(VERSION)-$(RELEASE)/
+	cd dist && tar -czvf ../$@ cmdarg-$(VERSION)-$(RELEASE)
+
+./dist/$(SRPM): $(DISTFILE)
+	rm -fr ./dist/$(SRPM)
+	mock --buildsrpm --spec $(SPECFILE) --sources ./dist/ --resultdir ./dist/ --define "version $(VERSION)" --define "release $(RELEASE)"
+
+./dist/$(RPM): ./dist/$(SRPM)
+	rm -fr ./dist/$(RPM)
+	mock -r epel-$(RHEL_VERSION)-noarch ./dist/$(SRPM) --resultdir ./dist/ --define "version $(VERSION)" --define "release $(RELEASE)"
+
+uninstall:
+	rm -f $(PREFIX)/usr/lib/cmdarg.sh
+
+
+install:
+	mkdir -p $(PREFIX)/usr/lib
+	install ./cmdarg.sh $(PREFIX)/usr/lib/cmdarg.sh
+
+MANIFEST:
+	echo /usr/lib/cmdarg.sh > MANIFEST
diff --git a/cmdarg.sh b/cmdarg.sh
index 23fdebb..7072446 100644
--- a/cmdarg.sh
+++ b/cmdarg.sh
@@ -1,5 +1,11 @@
 #!/bin/bash
 
+bashversion=$(bash --version | head -n 1 | grep "version [0-9]" | cut -d ' ' -f 2)
+if [ $bashversion -lt 4 ]; then
+    echo "cmdarg is incompatible with bash versions < 4.0, please upgrade bash" >&2
+    exit 1
+fi
+
 CMDARG_FLAG_WITHARG=1
 
 function cmdarg
diff --git a/cmdarg.spec b/cmdarg.spec
new file mode 100644
index 0000000..249380e
--- /dev/null
+++ b/cmdarg.spec
@@ -0,0 +1,27 @@
+%define __os_install_post %{nil}
+Summary: Bash Command Line Argument Parsing Library
+Name: cmdarg
+Version: %{version}
+Release: %{release}
+License: MIT
+Vendor: Andrew Kesterson
+Packager: Andrew Kesterson <andrew@aklabs.net>
+Group: Development Tools
+Provides: %{name}
+BuildArch: noarch
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}
+Source: %{name}-%{version}-%{release}.tar.gz
+
+Requires: bash
+
+%description
+
+%install
+mkdir -p %{buildroot}/usr/src
+tar -zxvf %{_sourcedir}/%{name}-%{version}-%{release}.tar.gz
+cd %{name}-%{version}-%{release}
+PREFIX=%{buildroot} make install
+PREFIX=%{buildroot} make MANIFEST
+cp MANIFEST /tmp/
+
+%files -f /tmp/MANIFEST