I want to install jsliacan/flagmatic-w (from GitHub) but it seems that my SAGE_ROOT variable is not defined.
agnishom@agnishomDuncan:~$ sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.5, Release Date: 2022-01-30 │
│ Using Python 3.10.6. Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
sage: SAGE_ROOT
sage:
Exiting Sage (CPU time 0m0.07s, Wall time 0m4.03s).
Also,
agnishom@agnishomDuncan:~$ echo $SAGE_ROOT
The result seems to be blank. How do I set this variable?
