Couldn't find the language specification anywhere, it basically the Nix source? The repo's README refers to the Nix manual, but it seems incomplete. For example
uibezierpath
richtextfx
crystal-reports
geronimo
string-search
aws-rails-provisioner
cyclomatic-complexity
mockito-inline
hook-woocommerce
der
r-table
nvme
onestepcheckout
internet-explorer
multistage-pipeline
cronofy
elastic-stack
azure-blueprints
google-studio
django-modeltranslation
mac-frameworks
nested-repeater
statefulwidget
traitsui
wtelegramclient
object-composition
pymssql
showdialog
oneplus6t
integer