Can't generate a random mac address

[TKRegulus]

When I follow the instructions from the beginning, when I get to the step of creating a mac address, I get this error. Does anyone know the solution? Please help me, thanks in advance TT

$ make -C tools gen_eth_addr make: Entering directory C:/Users/trunk/intelFPGA_lite/de0nano-wd/u-boot/tools' cc gen_eth_addr.c -o gen_eth_addr process_begin: CreateProcess(C:\Users\trunk\intelFPGA_lite\embedded\host_tools\cygwin\bin\cc, cc gen_eth_addr.c -o gen_eth_addr, ...) failed. make (e=5): Access is denied. make: *** [gen_eth_addr] Error 5 make: Leaving directory C:/Users/trunk/intelFPGA_lite/de0nano-wd/u-boot/tools'

[zangman]

Sorry for the slow reply.

make (e=5): Access is denied.

Sounds like the files can't be created. Did you run out of space on the hard disk?