This is a package, not a class

.gitignore

@@ -1,4 +1,4 @@
-flygenet.cls
+flygenet.sty
 flygenet.pdf
 dist
 *.aux

Makefile

@@ -1,9 +1,9 @@
 ENGINE = pdflatex
 DESTDIR = dist
 
-all: flygenet.cls flygenet.pdf
+all: flygenet.sty flygenet.pdf
 
-flygenet.cls flygenet.glo flygenet.idx: flygenet.dtx lppl-1-3c.tex
+flygenet.sty flygenet.glo flygenet.idx: flygenet.dtx lppl-1-3c.tex
 	$(ENGINE) $<
 
 flygenet.gls: flygenet.glo
@@ -16,18 +16,18 @@ flygenet.pdf: flygenet.dtx flygenet.gls flygenet.ind
 	$(ENGINE) $<
 	$(ENGINE) $<
 
-install: flygenet.pdf flygenet.cls
+install: flygenet.pdf flygenet.sty
 	mkdir -p $(DESTDIR)/src/latex/flygenet
 	mkdir -p $(DESTDIR)/doc/latex/flygenet
 	mkdir -p $(DESTDIR)/tex/latex/flygenet
 	install -m 644 flygenet.dtx lppl-1-3c.tex Makefile $(DESTDIR)/src/latex/flygenet
 	install -m 644 flygenet.pdf $(DESTDIR)/doc/latex/flygenet
-	install -m 644 flygenet.cls $(DESTDIR)/tex/latex/flygenet
+	install -m 644 flygenet.sty $(DESTDIR)/tex/latex/flygenet
 
 clean:
 	rm -f flygenet.{aux,glo,gls,idx,ilg,ind,log,out,toc}
 
 mrproper: clean
-	rm -f flygenet.{cls,pdf}
+	rm -f flygenet.{sty,pdf}
 
 .PHONY: clean mrproper

flygenet.dtx

@@ -36,7 +36,7 @@ has been generated for details.
 \endpreamble
 
 \generate{
-  \file{flygenet.cls}{\from{flygenet.dtx}{class}}
+  \file{flygenet.sty}{\from{flygenet.dtx}{package}}
 }
 
 \endgroup
@@ -83,7 +83,7 @@ has been generated for details.
 % \GetFileInfo{flygenet.dtx}
 %
 % \title{^^A
-%   The \textsf{flygenet} class\thanks{^^A
+%   The \textsf{flygenet} package\thanks{^^A
 %   This file has version number \fileversion, last revised \filedate.}}
 % \author{^^A
 %   Damien Goutte-Gattat\thanks{^^A
@@ -114,10 +114,10 @@ has been generated for details.
 % \section{The code}
 %
 % \subsection{Initialization code}
-% We start by identifying the class.
+% We start by identifying the package.
 %    \begin{macrocode}
 \NeedsTeXFormat{LaTeX2e}[2003/12/01]
-\ProvidesClass{flygenet}[2013/07/14 v0.1 Fly genetics notation]
+\ProvidesPackage{flygenet}[2013/07/14 v0.1 Fly genetics notation]
 %    \end{macrocode}
 %
 % \Finale