==> Making package: ocaml-lwt 2.4.2-2 (Wed Jan 22 12:25:22 CET 2014)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Downloading lwt-2.4.2.tar.gz...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  491k  100  491k    0     0   800k      0 --:--:-- --:--:-- --:--:--  801k
==> Validating source files with md5sums...
    lwt-2.4.2.tar.gz ... Passed
==> Extracting sources...
  -> Extracting lwt-2.4.2.tar.gz with bsdtar
==> Starting build()...
testing for pkg-config: ........................ available
testing for libev: ............................. available
testing for pthread: ........................... available
testing for glib: .............................. available
testing for eventfd: ........................... available
testing for fd passing: ........................ available
testing for sched_getcpu: ...................... available
testing for affinity getting/setting: .......... available
testing for credentials getting (Linux): ....... available
testing for credentials getting (NetBSD): ...... unavailable
testing for credentials getting (OpenBSD): ..... unavailable
testing for credentials getting (FreeBSD): ..... unavailable
testing for credentials getting (getpeereid): .. unavailable
testing for fdatasync: ......................... available
testing for netdb_reentrant: ................... available
Generating C stubs...

Configuration:
ocamlfind: ........................................... /usr/bin/ocamlfind
ocamlc: .............................................. /usr/bin/ocamlc.opt
ocamlopt: ............................................ /usr/bin/ocamlopt.opt
ocamlbuild: .......................................... /usr/bin/ocamlbuild
Package name: ........................................ lwt
Package version: ..................................... 2.4.2
os_type: ............................................. Unix
system: .............................................. linux
architecture: ........................................ amd64
ccomp_type: .......................................... cc
ocaml_version: ....................................... 4.01.0
standard_library_default: ............................ /usr/lib/ocaml
standard_library: .................................... /usr/lib/ocaml
standard_runtime: .................................... /usr/bin/ocamlrun
bytecomp_c_compiler: ................................. gcc -fno-defer-pop -Wall -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC
native_c_compiler: ................................... gcc -Wall -D_FILE_OFFSET_BITS=64 -D_REENTRANT
model: ............................................... default
ext_obj: ............................................. .o
ext_asm: ............................................. .s
ext_lib: ............................................. .a
ext_dll: ............................................. .so
default_executable_name: ............................. a.out
systhread_supported: ................................. true
Install architecture-independent files dir: .......... /usr
Install architecture-dependent files in dir: ......... $prefix
User executables: .................................... $exec_prefix/bin
System admin executables: ............................ $exec_prefix/sbin
Program executables: ................................. $exec_prefix/libexec
Read-only single-machine data: ....................... $prefix/etc
Modifiable architecture-independent data: ............ $prefix/com
Modifiable single-machine data: ...................... $prefix/var
Object code libraries: ............................... $exec_prefix/lib
Read-only arch-independent data root: ................ $prefix/share
Read-only architecture-independent data: ............. $datarootdir
Info documentation: .................................. $datarootdir/info
Locale-dependent data: ............................... $datarootdir/locale
Man documentation: ................................... $datarootdir/man
Documentation root: .................................. $datarootdir/doc/$pkg_name
HTML documentation: .................................. $docdir
DVI documentation: ................................... $docdir
PDF documentation: ................................... $docdir
PS documentation: .................................... $docdir
Prepend a path when installing package: .............. /tmp/yaourt-tmp-tom/aur-ocaml-lwt/pkg/ocaml-lwt
findlib_version: ..................................... 1.4
is_native: ........................................... true
suffix_program: ......................................
Remove a file.: ...................................... rm -f
Remove a directory.: ................................. rm -rf
Turn ocaml debug flag on: ............................ false
Turn ocaml profile flag on: .......................... false
Compiler support generation of .cmxs.: ............... true
OCamlbuild additional flags: .........................
build and install everything: ........................ false
Build the syntax extension: .......................... true
Unix support: ........................................ true
React helpers: ....................................... true
Glib integration: .................................... true
SSL support: ......................................... true
Text mode utilities (deprecated): .................... true
Preemptive threads support: .......................... true
Asynchronous unix functions: ......................... true
Enhanced toplevel: ................................... true
Compile with libev support: .......................... true
Use pthread: ......................................... true
Create documentations: ............................... true
Compile tests executable and library and run them: ... false
pkg_camlp4: .......................................... /usr/lib/ocaml/camlp4
pkg_camlp4_quotations_o: ............................. /usr/lib/ocaml/camlp4
pkg_unix: ............................................ /usr/lib/ocaml
pkg_bigarray: ........................................ /usr/lib/ocaml
pkg_react: ........................................... /usr/lib/ocaml/react
pkg_threads: ......................................... /usr/lib/ocaml
pkg_ssl: ............................................. /usr/lib/ocaml/ssl
pkg_text: ............................................ /usr/lib/ocaml/text
pkg_text_bigarray: ................................... /usr/lib/ocaml/text
pkg_findlib: ......................................... /usr/lib/ocaml/findlib
pkg_camlp4_extend: ................................... /usr/lib/ocaml/camlp4
ocamldoc: ............................................ /usr/bin/ocamldoc

ocaml setup.ml -build
Finished, 1 target (0 cached) in 00:00:00.
ocamlfind: Package `wikidoc' not found
findlib: [WARNING] cannot read directory /usr/lib/ocaml/site-lib: No such file or directory
+ ocamlfind ocamlc -c -package camlp4.quotations.o -package camlp4.extend -package camlp4 -syntax camlp4o -I syntax -o syntax/pa_optcomp.cmo syntax/pa_optcomp.ml
File "syntax/pa_optcomp.ml", line 217, characters 50-52:
Warning 3: deprecated feature: operator (or); you should use (||) instead
+ ocamlfind ocamlopt -c -package camlp4.quotations.o -package camlp4.extend -package camlp4 -syntax camlp4o -I syntax -o syntax/pa_optcomp.cmx syntax/pa_optcomp.ml
File "syntax/pa_optcomp.ml", line 217, characters 50-52:
Warning 3: deprecated feature: operator (or); you should use (||) instead
+ ocamlfind ocamlc -c -I src/core -package unix -package camlp4 -package bigarray -syntax camlp4o -ppopt syntax/pa_optcomp.cmo -I src/unix -I src/core -o src/unix/lwt_unix.cmi src/unix/lwt_unix.mli
File "src/unix/lwt_unix.mli", line 301, characters 5-233:
Error: This variant or record definition does not match that of type
         Unix.open_flag
       The field O_CLOEXEC is only present in the original definition.
Command exited with code 2.
Compilation unsuccessful after building 124 targets (0 cached) in 00:00:06.
E: Failure("Command '/usr/bin/ocamlbuild syntax/optcomp.cma syntax/optcomp.cmxs syntax/optcomp.cmxa syntax/optcomp.a src/core/lwt.cma src/core/lwt.cmxs src/core/lwt.cmxa src/core/lwt.a src/unix/liblwt-unix_stubs.a src/unix/dlllwt-unix_stubs.so src/unix/lwt-unix.cma src/unix/lwt-unix.cmxs src/unix/lwt-unix.cmxa src/unix/lwt-unix.a src/simple_top/lwt-simple-top.cma src/simple_top/lwt-simple-top.cmxs src/simple_top/lwt-simple-top.cmxa src/simple_top/lwt-simple-top.a src/react/lwt-react.cma src/react/lwt-react.cmxs src/react/lwt-react.cmxa src/react/lwt-react.a src/preemptive/lwt-preemptive.cma src/preemptive/lwt-preemptive.cmxs src/preemptive/lwt-preemptive.cmxa src/preemptive/lwt-preemptive.a src/extra/lwt-extra.cma src/extra/lwt-extra.cmxs src/extra/lwt-extra.cmxa src/extra/lwt-extra.a src/glib/liblwt-glib_stubs.a src/glib/dlllwt-glib_stubs.so src/glib/lwt-glib.cma src/glib/lwt-glib.cmxs src/glib/lwt-glib.cmxa src/glib/lwt-glib.a src/ssl/lwt-ssl.cma src/ssl/lwt-ssl.cmxs src/ssl/lwt-ssl.cmxa src/ssl/lwt-ssl.a src/text/liblwt-text_stubs.a src/text/dlllwt-text_stubs.so src/text/lwt-text.cma src/text/lwt-text.cmxs src/text/lwt-text.cmxa src/text/lwt-text.a src/top/lwt-top.cma src/top/lwt-top.cmxs src/top/lwt-top.cmxa src/top/lwt-top.a syntax/lwt-syntax.cma syntax/lwt-syntax.cmxs syntax/lwt-syntax.cmxa syntax/lwt-syntax.a syntax/lwt-syntax-options.cma syntax/lwt-syntax-options.cmxs syntax/lwt-syntax-options.cmxa syntax/lwt-syntax-options.a syntax/lwt-syntax-log.cma syntax/lwt-syntax-log.cmxs syntax/lwt-syntax-log.cmxa syntax/lwt-syntax-log.a src/top/lwt_toplevel.byte examples/unix/logging.native examples/unix/relay.native examples/unix/parallelize.native' terminated with error code 10")
make: *** [build] Error 1
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Makepkg was unable to build .