For those who required Linux wallet: I just compiled the linux wallet with the updated information in README.md.
It works! I will buy some to stake.

Just follow these steps:
git clone --recursive
https://github.com/spectrecoin/spectrecd spectre
./install_boost_1_67 # only necessary on Debian/Ubuntu/Mint/etc. If you have installed Boost 1_67 before, you may ignore this command for now
./autogen.sh
./configure --enable-gui --with-qt5=/path/to/qt/version/compiler # leave out --enable-gui to build only the console wallet
make