eosio.system got fatal error!

[dawnFromDark]

the master branch got a fatal error ,it can not be deployed on chain ,the error message is following:

root@ubuntu:/home/time/eosio.contracts/build/contracts# cleos set contract eosio eosio.system/
Reading WASM from /home/time/eosio.contracts/build/contracts/eosio.system/eosio.system.wasm...
Publishing contract...
Error 3070000: WASM Exception
Error Details:
env.is_feature_activated unresolveable

my nodeos version is 1.8.1 and eosio.cdt is 1.6.1, may you tell me what happend about this contract?

[dawnFromDark]

the contract which got error is eosio.system, may you fix it?

[dawnFromDark]

do you have any body to solve this issue ?

[lsf1001]

I also met this problem. How did you solve it ，eosio v1.8.1 eosio.contracts v1.7.0-rc1

[lsf1001]

@dawnFromDark

[MrToph]

@lsf1001 Running the step described here in the Preactivate feature
section solved the issue for me.