installation fails when ~/.omakerc is present

[gerdstolpmann]

in particular ~/.omakerc with

OMakeFlags(-j 8)

Error:

   Invalid argument: Omake_exec.find_best_server: all servers are disabled
 - backtrace: Raised at Omake_exec.Exec.find_best_server in file "omake_exec.ml", line 177, characters 15-95
Called from Omake_exec.Exec.spawn in file "omake_exec.ml", line 185, characters 19-47
Called from Omake_build.execute_scanner in file "omake_build.ml", line 1330, characters 10-150
Called from Omake_build.main_loop in file "omake_build.ml", line 2194, characters 6-23
Called from Omake_build.build_targets in file "omake_build.ml", line 2361, characters 12-20
Called from Omake_build.build_core in file "omake_build.ml", line 2468, characters 2-77
Called from Omake_build.build_time in file "omake_build.ml", line 2512, characters 6-52
Called from Omake_build.build in file "omake_build.ml", line 2526, characters 4-67
Re-raised at Omake_build.build_core.(fun) in file "omake_build.ml", line 2465, characters 24-90
Called from Omake_main.main in file "omake_main.ml", line 291, characters 4-182
Called from Omake_exn_print.catch in file "omake_exn_print.ml", line 117, characters 6-9

Command exited with error: boot/omake '--dotomake' '.omake' '--force-dotomake' '-j1' 'main' 'OCAML=ocaml'