Make fails On ubuntu 14.04:ocamlfind: Package `bytes' not found

[zfalcon]

make[1]: Entering directory /tmp/buildd/liblwt-ocaml-2.4.8' debian/build.sh ocamlfind: Packagebytes' not found
W: Field 'pkg_bytes' is not set: Command ''/usr/bin/ocamlfind' query -format %d bytes > '/tmp/oasis-40795f.txt'' terminated with error code 2
E: Cannot find findlib package bytes
E: Failure("1 configuration error")

But When I tar this package and enter the folder(_build/SRPMS/lwt-2.4.8#) , use command list:
./configure --disable-libev
make

it‘s Successful!

[zfalcon]

xapi@ubxapi:~/xapi/buildroot# opam list

Installed packages for system:

base-bigarray base
base-bytes legacy
base-no-ppx base
base-threads base
base-unix base
cdrom 0.9.1
cmdliner 0.9.7
cppo 1.1.2
ctypes-foreign 0.4.0
fd-send-recv 1.0.1
obuild 0.1.5
ocamlfind 1.5.5
oclock 0.4.0
ocplib-endian 0.8
omake 0.9.8.6-0.rc1
ounit 2.0.0
re 1.4.1
syslog 1.4
uuidm 0.9.5
xapi-inventory 0.9.1
xapi-stdext 0.12.0
xmlm 1.2.0

[jonludlam]

This will be because we are using ocamlfind from Ubuntu which is older than required. We need to back port a newer version. I don't recall exactly which ocamlfind version introduced the 'bytes', but it's certainly in 1.5.5, which is why the opam build succeeded.

[zfalcon]

Thank you for your reply!

How do I debug it? Can you share a VM what is compiled xapi environment? Example ova file...

Thank you very much!!