private-build-plans-linux.toml

[buildPlans.iosevka-custom]      # <iosevka-custom> is your plan name
family = "Iosevka Custom"        # Font menu family name
spacing = "normal"               # Optional; Values: `normal`, `term`, `fontconfig-mono`, or `fixed`
serifs = "sans"                  # Optional; Values: `sans` or `slab`
export-glyph-names = "true"

[buildPlans.iosevka-custom.metric-override]
leading = 1400