x11-wm/gamescope: unbreak build after b35bdcd8

Run-time dependency glm found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency glm
Downloading glm source from https://github.com/g-truc/glm/archive/0.9.9.8.tar.gz
<urlopen error [Errno 8] Name does not resolve>
WARNING: failed to download with error: could not get https://github.com/g-truc/glm/archive/0.9.9.8.tar.gz is the internet available?. Trying after a delay...
<urlopen error [Errno 8] Name does not resolve>
WARNING: failed to download with error: could not get https://github.com/g-truc/glm/archive/0.9.9.8.tar.gz is the internet available?. Trying after a delay...
<urlopen error [Errno 8] Name does not resolve>
WARNING: failed to download with error: could not get https://github.com/g-truc/glm/archive/0.9.9.8.tar.gz is the internet available?. Trying after a delay...
<urlopen error [Errno 8] Name does not resolve>
WARNING: failed to download with error: could not get https://github.com/g-truc/glm/archive/0.9.9.8.tar.gz is the internet available?. Trying after a delay...
<urlopen error [Errno 8] Name does not resolve>
WARNING: failed to download with error: could not get https://github.com/g-truc/glm/archive/0.9.9.8.tar.gz is the internet available?. Trying after a delay...
<urlopen error [Errno 8] Name does not resolve>
A fallback URL could be specified using source_fallback_url key in the wrap file

layer/meson.build:4:10: ERROR: could not get https://github.com/g-truc/glm/archive/0.9.9.8.tar.gz is the internet available?

Reported by:	pkg-fallout