WebKit failed on x86_64 dockyard-devel (c64.arklinux.org)

WebKit failed to build on x86_64 for dockyard-devel.
Last 250 lines of build log:

Installing WebKit-1.0-0.27595.1ark.src.rpm
Building target platforms: x86_64
Building for target x86_64
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.47365
+ umask 022
+ cd /build-WebKit-x86_64/BUILD
+ cd /build-WebKit-x86_64/BUILD
+ rm -rf WebKit
+ tar -xf /usr/src/ark/SOURCES/WebKit-27595.tar.lz
+ cd WebKit
++ /usr/bin/id -u
+ '[' 0 = 0 ']'
+ /bin/chown -Rhf root .
++ /usr/bin/id -u
+ '[' 0 = 0 ']'
+ /bin/chgrp -Rhf root .
+ /bin/chmod -Rf a+rX,g-w,o-w .
+ echo 'Patch #0 (WebKit-compile.patch):'
Patch #0 (WebKit-compile.patch):
+ patch -p1 -b --suffix .compile~ -s
+ exit 0
Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.59803
+ umask 022
+ cd /build-WebKit-x86_64/BUILD
+ cd WebKit
+ export QTDIR=/usr/lib64/qt4
+ QTDIR=/usr/lib64/qt4
+ export PATH=/usr/lib64/qt4/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/usr/X11R6/bin:/root/bin
+ PATH=/usr/lib64/qt4/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/usr/X11R6/bin:/root/bin
+ WebKitTools/Scripts/build-webkit
Can't exec "qmake": No such file or directory at /build-WebKit-x86_64/BUILD/WebKit/WebKitTools/Scripts/webkitdirs.pm line 647.
Use of uninitialized value in scalar chomp at /build-WebKit-x86_64/BUILD/WebKit/WebKitTools/Scripts/webkitdirs.pm line 647.
Calling 'qmake CONFIG+=qt-port -r OUTPUT_DIR=/build-WebKit-x86_64/BUILD/WebKit/WebKitBuild/Release /build-WebKit-x86_64/BUILD/WebKit/WebKit.pro CONFIG+=release CONFIG-=debug' in /build-WebKit-x86_64/BUILD/WebKit/WebKitBuild/Release ...

Can't exec "qmake": No such file or directory at /build-WebKit-x86_64/BUILD/WebKit/WebKitTools/Scripts/webkitdirs.pm line 713.
Failed to setup build environment using qmake!
error: Bad exit status from /var/tmp/rpm-tmp.59803 (%build)


RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.59803 (%build)