beer". Recipe development While the first "Vores øl" recipe drew some technical criticism, the recipe was continuously updated and identified shortcomings were fixed. Originally, the homebrewing community complained about the quality of the process and ingredient description. Remarks were that it was not stated how much water to use in the mash, what type of yeast was to be used, the style of beer being produced (other than being dark and heavy), whether or not any hops were being added for aroma, fermentation temperature, or how the beer was supposed to taste. Making reference to the technical problems of when software instructions ("source code") cannot be made into a functioning program, it was mentioned that if this recipe were source code, it would not compile. Because of the underlying theme of the group's message, the correction and development of this recipe is actively encouraged (in software terminology "bug fixing and patches"). Due to the availability of the recipe and the many Free Beer brewings of breweries and individuals worldwide over the course of years, the recipe was updated several times. Later major Free Beer recipe iterations (v3.0 and 4.0) were also developed in collaboration with a local Danish and experienced brewery, Skands in Brøndby. As previous recipe shortcomings were corrected, for instance the amount of sugar was decreased by 90%, the quality of the beer improved significantly. The recipe's version, which has now reached 6.0 in 2017, illustrates the community's continuous collaborative improvement progress, made possible by the "open source" nature of Free Beer. Derived beers Under its free license, this free beer encourages others to tweak the recipe and redistribute it. Commercial or amateur brewers are able to reuse the recipe. Known derivatives include: Switzerland/Lausanne: Le Baiser de la Princesse (French for: "The Kiss of the Princess"), in 2008. France/Schiltigheim: Affichage Libre, brewed specially for the 2011 edition of the Rencontres Mondiales du Logiciel Libre (free software meeting) in Strasbourg. Others took the political idea of an "open/free beer" (not Free Beer recipe and label), opened their own beer recipes and/or artwork, often under free licenses: United States/Frederick: Flying Dog Brewery created in July 2007 an open source beer called "Collaborator Doppelbock" (while without specified license). Switzerland/Zürich: In 2008, project 21's "FreeBeer" brewed by "Wädi-Brau-Huus" in Wädenswil with own recipe and label. Germany/Hannover: In March 2009 a free Red Beer was brewed for a local Wikipedia group meeting in