patching sources
updateAutotoolsGnuConfigScriptsPhase
configuring
configure flags: --prefix=/nix/store/ik12fv3y0vyirzv4dajw2c71h1qsk4x1-libjack2-1.9.14-armv7l-unknown-linux-gnueabihf --classic --autostart=dbus --dbus configure --cross-compile --cross-execute=/nix/store/j44q9fa4jg5zbwf30bpcimpw8qx816px-qemu-5.0.0/bin/qemu-arm
waf [commands] [options]

Main commands (example: ./waf build -j4)
  build    : executes the build
  clean    : cleans the project
  configure: configures the project
  dist     : creates an archive containing the project source code
  distcheck: checks if the project compiles (tarball from 'dist')
  distclean: removes build folders and data
  install  : installs the targets on the system
  list     : lists the targets to execute
  mm_hook  : Alias .mm files to be compiled the same as .cpp files, gcc will do the right thing.
  step     : executes tasks in a step-by-step fashion, for debugging
  uninstall: removes the targets installed
  xcode6   : 

Options:
  --version             show
                        program's
                        version
                        number and
                        exit
  -c COLORS, --color=COLORS
                        whether to
                        use colors 
                        (yes/no/aut
                        o)
                        [default:
                        auto]
  -j JOBS, --jobs=JOBS  amount of
                        parallel
                        jobs (4)
  -k, --keep            continue
                        despite
                        errors (-kk
                        to try
                        harder)
  -v, --verbose         verbosity
                        level -v
                        -vv or -vvv
                        [default:
                        0]
  --zones=ZONES         debugging
                        zones
                        (task_gen,
                        deps,
                        tasks, etc)
  -h, --help            show this
                        help
                        message and
                        exit
  --htmldir=HTMLDIR     HTML docume
                        ntation
                        directory
                        [Default: <
                        prefix>/sha
                        re/jack-
                        audio-
                        connection-
                        kit/referen
                        ce/html/
  --libdir=LIBDIR       Library
                        directory
                        [Default: <
                        prefix>/lib
                        ]
  --libdir32=LIBDIR32   32bit
                        Library
                        directory
                        [Default: <
                        prefix>/lib
                        32]
  --mandir=MANDIR       Manpage
                        directory
                        [Default: <
                        prefix>/sha
                        re/man/man1
                        ]
  --platform=PLATFORM   Target
                        platform
                        for cross-
                        compiling,
                        e.g. cygwin
                        or win32
  --mixed               Build with
                        32/64 bits
                        mixed mode
  --debug               Build
                        debuggable
                        binaries
  --classic             Force
                        enable
                        standard
                        JACK
                        (jackd)
                        even if
                        D-Bus JACK
                        (jackdbus)
                        is enabled
                        too
  --dbus                Enable
                        D-Bus JACK
                        (jackdbus)
  --autostart=AUTOSTART
                        Autostart
                        method.
                        Possible
                        values:
                        "default",
                        "classic",
                        "dbus",
                        "none"
  --profile             Build with
                        engine
                        profiling
  --clients=CLIENTS     Maximum
                        number of
                        JACK
                        clients
  --ports-per-application=APPLICATION_PORTS
                        Maximum
                        number of
                        ports per
                        application
  --systemd-unit        Install
                        systemd
                        units.
  --doxygen=no|yes      Build
                        doxygen doc
                        umentation
                        (disabled
                        by default)
  --alsa=no|yes         Enable ALSA
                        driver
                        (enabled by
                        default if
                        possible)
  --firewire=no|yes     Enable
                        FireWire
                        driver
                        (FFADO)
                        (enabled by
                        default if
                        possible)
  --iio=no|yes          Enable IIO
                        driver
                        (enabled by
                        default if
                        possible)
  --portaudio=no|yes    Enable
                        Portaudio
                        driver
                        (enabled by
                        default if
                        possible)
  --winmme=no|yes       Enable
                        WinMME
                        driver
                        (enabled by
                        default if
                        possible)
  --celt=no|yes         Build with
                        CELT
                        (enabled by
                        default if
                        possible)
  --opus=no|yes         Build Opus
                        netjack2
                        (enabled by
                        default if
                        possible)
  --samplerate=no|yes   Build with 
                        libsamplera
                        te (enabled
                        by default
                        if
                        possible)
  --sndfile=no|yes      Build with
                        libsndfile
                        (enabled by
                        default if
                        possible)
  --readline=no|yes     Build with
                        readline
                        (enabled by
                        default if
                        possible)
  --systemd=no|yes      Use systemd
                        notify
                        (enabled by
                        default if
                        possible)
  --db=no|yes           Use
                        Berkeley DB
                        (metadata)
                        (enabled by
                        default if
                        possible)
  --enable-pkg-config-dbus-service-dir
                        force D-Bus
                        service
                        install dir
                        to be one
                        returned by
                        pkg-config

  Configuration options:
    -o OUT, --out=OUT   build dir
                        for the
                        project
    -t TOP, --top=TOP   src dir for
                        the project
    --prefix=PREFIX     installatio
                        n prefix
                        [default: '
                        /usr/local/
                        ']
    --bindir=BINDIR     bindir
    --check-cxx-compiler=CHECK_CXX_COMPILER
                        list of C++
                        compilers
                        to try [g++
                        clang++
                        icpc]
    --check-c-compiler=CHECK_C_COMPILER
                        list of C
                        compilers
                        to try [gcc
                        clang icc]

  Build and installation options:
    -p, --progress      -p:
                        progress
                        bar; -pp:
                        ide output
    --targets=TARGETS   task
                        generators,
                        e.g. "targe
                        t1,target2"

  Step options:
    --files=FILES       files to
                        process, by
                        regexp,
                        e.g. "*/mai
                        n.c,*/test/
                        main.o"

  Installation and uninstallation options:
    --destdir=DESTDIR   installatio
                        n root
                        [default:
                        '']
    -f, --force         force file 
                        installatio
                        n
    --distcheck-args=ARGS
                        arguments
                        to pass to
                        distcheck
waf: error: no such option: --cross-compile
builder for '/nix/store/04hfp0x9y02jsvvrsg38r4kzqlybbcq0-libjack2-1.9.14-armv7l-unknown-linux-gnueabihf.drv' failed with exit code 2