Revert "Fix description in Nix derivation"
Revert "Fix description in Nix derivation"

This reverts commit 9365bf297c3e1a47d97dbc92e9f2df5aea590126.

YosysHQ/nextpnr,YosysHQ/nextpnr,YosysHQ/nextpnr,SymbiFlow/nextpnr,SymbiFlow/nextpnr,SymbiFlow/nextpnr,YosysHQ/nextpnr,SymbiFlow/nextpnr