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
bitmapdrawable
microsoft-graph-security
reference-library
kotlin-sharedflow
rust-proc-macros
weatherdata
cisco-ios
gold-linker
photutils
pypubsub
javacard
imblearn
compiler-construction
impactjs
trace-listener
maven-release-plugin
gfs
strong-typing
data-acquisition
metacharacters
flutter-card
ruby-1.9.3
aws-java-sdk
metaspace
8051
exploit
associated-value
ply
error-stream
embedded-sql