I'm not having trouble building Nyxt today using Guix commit 9703a51. Perhaps OP can try to build it again now. christopher@theoden ~$ neofetch --stdout christopher@theoden ------------------- OS: Guix System 9703a51048fbc1d322595d676ff0d63b1eb89304 x86_64 Host: OptiPlex 9020 00 Kernel: 5.12.8-gnu Uptime: 8 days, 7 hours, 22 mins Packages: 92 (guix-system), 108 (guix-user) Shell: bash 5.0.16 Resolution: 1920x1080 DE: GNOME Theme: Adwaita [GTK2/3] Icons: Adwaita [GTK2/3] Terminal: kitty CPU: Intel i5-4570 (4) @ 3.600GHz GPU: Intel HD Graphics GPU: AMD ATI Radeon HD 8490 / R5 235X OEM Memory: 4903MiB / 7869MiB Christopher Howard