Why doesn't ffmpeg see the libraries after compiling?

Question

Source

Hi
Faced an error after compiling:

ffmpeg: error while loading shared libraries: libzimg.so.2: cannot open shared object file: No such file or directory

I compiled libzimg like this:

echo "libzimg"
cd ~/ffmpeg_sources
git clone --depth 1 https://github.com/sekrit-twc/zimg.git
cd zimg
./autogen.sh
./configure --prefix="$HOME/ffmpeg_build" --disable-static --enable-shared
make -j 10
make install

Next, ffmpeg compiled as follows:

echo "FFmpeg"
cd ~/ffmpeg_sources
curl -O -L https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
tar xjvf ffmpeg-snapshot.tar.bz2
cd ffmpeg
PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig"
PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig"
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
 ./configure \
  --prefix="$HOME/ffmpeg_build" \
  --pkg-config-flags="--static" \
  --extra-cflags="-I$HOME/ffmpeg_build/include" \
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
  --extra-libs=-lpthread \
  --extra-libs=-lm \
  --bindir="$HOME/bin" \
  --enable-gpl \
  --enable-libfdk_aac \
  --enable-libfreetype \
  --enable-libmp3lame \
  --enable-libopus \
  --enable-libvorbis \
  --enable-libvpx \
  --enable-libx264 \
  --enable-libx265 \
  --enable-nonfree \
  --enable-libzmq \
  --enable-openssl \
  --enable-libzimg
make -j 10
make install
hash -r

As I understand it, for some reason ffmpeg does not pull up when compiling the libzimg library. But I don't understand why.
Tried to build libzimg with and without prefixes.
Where can I read about compiling from source to understand why the library is not included?