Here is some more info from (Feisty): I have not checked to see if avidemux really needs libsmjs to compile.
$ apt-cache showsrc avidemux | grep '^Build-Depends' Build-Depends: debhelper (>> 4), libgtk2.0-dev, liblame-dev, libmad0-dev, liba52-0.7.4-dev, libvorbis-dev, libmjpegtools-dev, libxvidcore4-dev, libfreetype6-dev, libxml2-dev, libasound2-dev, libsdl-dev, libsmjs-dev, libfaac-dev (>= 1.24), libfaad2-dev, libxv-dev, libx264-dev $ sudo aptitude install libsmjs-dev ... The following packages are BROKEN: firefox libebook1.2-9 libedataserverui1.2-8 The following NEW packages will be automatically installed: libmozjs-dev libmozjs0d libnspr4-0d libnspr4-dev The following packages will be automatically REMOVED: libnspr4 The following NEW packages will be installed: libmozjs-dev libmozjs0d libnspr4-0d libnspr4-dev libsmjs-dev The following packages will be REMOVED: libnspr4 ... The following packages have unmet dependencies: firefox: Depends: libnspr4 (>= 2:1.firefox1.5.dfsg+1.5.0.5-0ubuntu6.06.1) but it is not installable libebook1.2-9: Depends: libnspr4 but it is not installable libedataserverui1.2-8: Depends: libnspr4 but it is not installable -- apt-get build-dep fails https://launchpad.net/bugs/71802 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs