Checkbox fails to build in a schroot:

msgfmt po/hr.po -o build/mo/hr/LC_MESSAGES/checkbox.mo
po/hr.po:2672: duplicate message definition...
po/hr.po:65: ...this is the location of the first definition
po/hr.po:2675: duplicate message definition...
po/hr.po:75: ...this is the location of the first definition
po/hr.po:2687: duplicate message definition...
po/hr.po:83: ...this is the location of the first definition
po/hr.po:2693: duplicate message definition...
po/hr.po:147: ...this is the location of the first definition
po/hr.po:2696: duplicate message definition...
po/hr.po:91: ...this is the location of the first definition
po/hr.po:2702: duplicate message definition...
po/hr.po:103: ...this is the location of the first definition
po/hr.po:2708: duplicate message definition...
po/hr.po:666: ...this is the location of the first definition
po/hr.po:2720: duplicate message definition...
po/hr.po:494: ...this is the location of the first definition
po/hr.po:2723: duplicate message definition...
po/hr.po:160: ...this is the location of the first definition
po/hr.po:2726: duplicate message definition...
po/hr.po:460: ...this is the location of the first definition
po/hr.po:2735: duplicate message definition...
po/hr.po:1152: ...this is the location of the first definition
po/hr.po:2738: duplicate message definition...
po/hr.po:1157: ...this is the location of the first definition
po/hr.po:2741: duplicate message definition...
po/hr.po:510: ...this is the location of the first definition
po/hr.po:2744: duplicate message definition...
po/hr.po:1274: ...this is the location of the first definition
po/hr.po:2747: duplicate message definition...
po/hr.po:987: ...this is the location of the first definition
po/hr.po:2750: duplicate message definition...
po/hr.po:1432: ...this is the location of the first definition
po/hr.po:2753: duplicate message definition...
po/hr.po:754: ...this is the location of the first definition
po/hr.po:2756: duplicate message definition...
po/hr.po:759: ...this is the location of the first definition
po/hr.po:2759: duplicate message definition...
po/hr.po:1279: ...this is the location of the first definition
po/hr.po:2762: duplicate message definition...
po/hr.po:1284: ...this is the location of the first definition
po/hr.po:2765: duplicate message definition...
po/hr.po:1510: ...this is the location of the first definition
po/hr.po:2768: duplicate message definition...
po/hr.po:1783: ...this is the location of the first definition
po/hr.po:2771: duplicate message definition...
po/hr.po:769: ...this is the location of the first definition
po/hr.po:2774: duplicate message definition...
po/hr.po:671: ...this is the location of the first definition
po/hr.po:2777: duplicate message definition...
po/hr.po:700: ...this is the location of the first definition
po/hr.po:2780: duplicate message definition...
po/hr.po:706: ...this is the location of the first definition
po/hr.po:2784: duplicate message definition...
po/hr.po:717: ...this is the location of the first definition
po/hr.po:2787: duplicate message definition...
po/hr.po:734: ...this is the location of the first definition
po/hr.po:2790: duplicate message definition...
po/hr.po:1230: ...this is the location of the first definition
po/hr.po:2797: duplicate message definition...
po/hr.po:1223: ...this is the location of the first definition
po/hr.po:2800: duplicate message definition...
po/hr.po:1216: ...this is the location of the first definition
po/hr.po:2807: duplicate message definition...
po/hr.po:1209: ...this is the location of the first definition
po/hr.po:2810: duplicate message definition...
po/hr.po:1244: ...this is the location of the first definition
po/hr.po:2817: duplicate message definition...
po/hr.po:1237: ...this is the location of the first definition
po/hr.po:2820: duplicate message definition...
po/hr.po:1188: ...this is the location of the first definition
po/hr.po:2827: duplicate message definition...
po/hr.po:1195: ...this is the location of the first definition
po/hr.po:2830: duplicate message definition...
po/hr.po:1202: ...this is the location of the first definition
po/hr.po:2837: duplicate message definition...
po/hr.po:1181: ...this is the location of the first definition
po/hr.po:2840: duplicate message definition...
po/hr.po:1258: ...this is the location of the first definition
po/hr.po:2847: duplicate message definition...
po/hr.po:1251: ...this is the location of the first definition
msgfmt: found 40 fatal errors
error: command 'msgfmt' failed with exit status 1
dh_auto_build: python setup.py build --force returned exit code 1
make: *** [build] Error 1
dpkg-buildpackage: error: debian/rules build gave error exit status 2