$ git clone git://git.kernel.org/pub/scm/utils/dtc/dtc.git
$ cd dtc
$ git describe HEAD
v1.4.5-18-gb260c4f610c0
$ make -j
## Skipping pylibfdt (install python dev and swig to build)
$ make install DESTDIR=$PWD/foo
        CHK version_gen.h
## Skipping pylibfdt (install python dev and swig to build)
         INSTALL-BIN
         INSTALL-LIB
         INSTALL-INC
         PYMOD pylibfdt/_libfdt.so
unable to execute 'swig': No such file or directory
error: command 'swig' failed with exit status 1
make: *** [pylibfdt/_libfdt.so] Error 1