I'm building chipyard on Arch Linux and error happens. https://github.com/ucb-bar/chipyard I get this error like this.
git clone https://github.com/ucb-bar/chipyard.git
cd chipyard
export MAKEFLAGS=-j$(nproc) ./scripts/build-toolchain-extra.sh riscv-tools --ignore-qemu 2&>1
cd chipyard/sims/verilator
sudo make CONFIG=RocketConfig
/home/user/chipyard/common.mk:7: *** RISCV is unset. You must set RISCV yourself, or through the Chipyard auto-generated env file. Stop.
I installed riscv package by using "pacman". Tell me a solution.