I try build debian packages from source and cannot resolve this error Could you help fix this root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f# dpkg-buildpackage *dpkg-buildpackage: *info: source package freeswitch *dpkg-buildpackage: *info: source version 1.8.1+git~20180820T214133Z~aa3c034e9f-1~stretch+1 *dpkg-buildpackage: *info: source distribution testing *dpkg-buildpackage: *info: source changed by Travis Cross < tc@traviscross.com> *dpkg-buildpackage: *info: host architecture amd64 * dpkg-source --before-build freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f* *dpkg-checkbuilddeps: **error*: Unmet build dependencies: libflite-dev libv8fs-6.1-dev *dpkg-buildpackage: **warning*: build dependencies/conflicts unsatisfied; aborting *dpkg-buildpackage: **warning*: (Use -d flag to override.) root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f# root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f# root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f# root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f# root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f# apt-get install libv8fs-6.1-dev Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libv8fs-6.1-dev E: Couldn't find any package by glob 'libv8fs-6.1-dev' E: Couldn't find any package by regex 'libv8fs-6.1-dev' root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f# apt-get install libflite-dev Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: libflite-dev : Depends: libflite1 (= 2.0.0-0~1-jessie+1) but 2.0.0-release-3+b1 is to be installed E: Unable to correct problems, you have held broken packages. root@node0:~/freeswitch-1.8.1+git~20180820T214133Z~aa3c034e9f#