Make error, FFmpeg build fails on Debian 7.7

[Jan Prochazka]

This guide doesn't work on Debian 7.7
​https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

When you try this step:

PATH="$PATH:$HOME/bin" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
  --prefix="$HOME/ffmpeg_build" \
  --extra-cflags="-I$HOME/ffmpeg_build/include" \
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
  --bindir="$HOME/bin" \
  --enable-gpl \
  --enable-libass \
  --enable-libfdk-aac \
  --enable-libfreetype \
  --enable-libmp3lame \
  --enable-libopus \
  --enable-libtheora \
  --enable-libvorbis \
  --enable-libvpx \
  --enable-libx264 \
  --enable-nonfree \
  --enable-x11grab
PATH="$PATH:$HOME/bin" make

It ends with:

[...]
ffmpeg/ffplay.c
Unknown option "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/bin:/root/bin".
See ./configure --help for available options.
Makefile:2: config.mak: No such file or directory
Makefile:59: /common.mak: No such file or directory
Makefile:100: /libavutil/Makefile: No such file or directory
Makefile:100: /library.mak: No such file or directory
Makefile:102: /doc/Makefile: No such file or directory
Makefile:185: /tests/Makefile: No such file or directory
make: *** No rule to make target `/tests/Makefile'.  Stop.
Makefile:2: config.mak: No such file or directory
Makefile:59: /common.mak: No such file or directory
Makefile:100: /libavutil/Makefile: No such file or directory
Makefile:100: /library.mak: No such file or directory
Makefile:102: /doc/Makefile: No such file or directory
Makefile:185: /tests/Makefile: No such file or directory
make: *** No rule to make target `/tests/Makefile'.  Stop.