Где взять xdevel для Worker?

z@debian:~/tmp/Worker/worker-2.17.10$ ./configure 
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking for a BSD-compatible install... /usr/bin/install -c
checking for ranlib... ranlib
checking for gawk... (cached) mawk
checking the maximum length of command line arguments... 98304
checking how to run the C++ preprocessor... g++ -E
checking for X... no
configure: error: X Window libraries and headers not found!
*********************************************************************
* Check your X installation (many distributions have these files in *
* the ...devel-packages (e.g. xdevel)).                             *
*********************************************************************