Yes, last time I tried I had a similar issue: this is because you need the latest guile-sdl2 and guile-opengl. All three projects are by David Thompson who kindly provided a Guix package definition within the repositories. Simply use that to update the 2 libraries packages. As I mentioned in an e-mail I've sent recently, I'd like to update the 2 package definitions in Guix and add Chickadee to the Guix repo. What do you think? -- Pierre Neidhardt