make_ext4fs missing from JB (stops Andry Birds install)

Trying to intsall Angry Birds on https://android-build.linaro.org/builds/~linaro-android/vexpress-jb-gcc47-armlt-tracking-open-12.08-release/#build=1

Gives...

D/VoldCmdListener( 1772): asec list
I/PackageHelper( 2758): Size of container 19 MB
D/VoldCmdListener( 1772): asec create smdl2tmp1 19 ext4 {} 10027 1
E/logwrapper( 2981): executing /system/bin/make_ext4fs failed: No such file or directory
I/logwrapper( 1772): /system/bin/make_ext4fs terminated by exit(255)
E/Vold ( 1772): Format (ext4) failed (unknown exit code 255)
E/Vold ( 1772): ASEC fs format failed (I/O error)
E/VoldConnector( 2016): NDC Command {10 asec create smdl2tmp1 19 ext4 64919545f4712b4ddb17c015491781eb 10027 1} took too long (809ms)
E/PackageHelper( 2758): Failed to create secure container smdl2tmp1