Assuming you installed it to C:\devkitpro, make sure you set
the DEVKITARM environment variable to /c/devkitPro/devkitARM :
export DEVKITARM=/c/devkitPro/devkitARM
Assuming you installed it to C:\devkitpro, make sure you set
the DEVKITARM environment variable to /c/devkitPro/devkitARM :
export DEVKITARM=/c/devkitPro/devkitARM