Marvin, the developer of microg, has posted a workaround using adb or using a terminal app.
I have tried the adb solution, and it worked (at least on my phone )
According to Marvin, you seem to need root if you use the terminal app solution.
- First, download the correct apk as described by @petefoth above.
- Then, follow Marvin’s instructions. Replace the apk name
core-nightly.apk
by the name you have given to the apk. - Do not forget to reboot (the last command
adb reboot
in the adb instructions does this).