Issues with installing

Hello,

I have issues with installing Siril:

• I tried to install it from AUR using yay -S siril - I got an error checking for OPENCV... no configure: error: opencv not found. Not using some image processing. and installation was aborted (I have OpenCV installed though)
• I got the same error as above when I tried to build the program from source, using supplied autogen.sh
• After these failures I downloaded the .deb file from Siril website and I tried to install it using dpkg -i command and I got this error:

(Reading database ... 89 files and directories currently installed.)
Preparing to unpack siril_0.9.9-1_amd64-stretch.deb ...
Unpacking siril (0.9.9-1) over (0.9.9-1) ...
dpkg: dependency problems prevent configuration of siril:
 siril depends on libatk1.0-0 (>= 1.12.4); however:
  Package libatk1.0-0 is not installed.
 siril depends on libavcodec57 (>= 7:3.2.10) | libavcodec-extra57 (>= 7:3.2.10); however:
  Package libavcodec57 is not installed.
  Package libavcodec-extra57 is not installed.
 siril depends on libavformat57 (>= 7:3.2.10); however:
  Package libavformat57 is not installed.
 siril depends on libavutil55 (>= 7:3.2.10); however:
  Package libavutil55 is not installed.
 siril depends on libc6 (>= 2.14); however:
  Package libc6 is not installed.
 siril depends on libcairo-gobject2 (>= 1.10.0); however:
  Package libcairo-gobject2 is not installed.
 siril depends on libcairo2 (>= 1.6.0); however:
  Package libcairo2 is not installed.
 siril depends on libcfitsio5 (>= 3.390~); however:
  Package libcfitsio5 is not installed.
 siril depends on libconfig9; however:
  Package libconfig9 is not installed.
 siril depends on libcurl3-gnutls (>= 7.16.2); however:
  Package libcurl3-gnutls is not installed.
 siril depends on libffms2-4 (>= 2.21); however:
  Package libffms2-4 is not installed.
 siril depends on libfftw3-double3 (>= 3.3.5); however:
  Package libfftw3-double3 is not installed.
 siril depends on libgcc1 (>= 1:4.0); however:
  Package libgcc1 is not installed.
 siril depends on libgdk-pixbuf2.0-0 (>= 2.22.0); however:
  Package libgdk-pixbuf2.0-0 is not installed.
 siril depends on libglib2.0-0 (>= 2.39.91); however:
  Package libglib2.0-0 is not installed.
 siril depends on libgomp1 (>= 4.9); however:
  Package libgomp1 is not installed.
 siril depends on libgsl2; however:
  Package libgsl2 is not installed.
 siril depends on libgtk-3-0 (>= 3.21.5); however:
  Package libgtk-3-0 is not installed.
 siril depends on libjpeg62-turbo (>= 1.3.1); however:
  Package libjpeg62-turbo is not installed.
 siril depends on liblcms2-2 (>= 2.2+git20110628); however:
  Package liblcms2-2 is not installed.
 siril depends on libopencv-core2.4v5; however:
  Package libopencv-core2.4v5 is not installed.
 siril depends on libopencv-imgproc2.4v5; however:
  Package libopencv-imgproc2.4v5 is not installed.
 siril depends on libpango-1.0-0 (>= 1.14.0); however:
  Package libpango-1.0-0 is not installed.
 siril depends on libpangocairo-1.0-0 (>= 1.14.0); however:
  Package libpangocairo-1.0-0 is not installed.
 siril depends on libpng16-16 (>= 1.6.2-1); however:
  Package libpng16-16 is not installed.
 siril depends on libraw15 (>= 0.16.0); however:
  Package libraw15 is not installed.
 siril depends on libstdc++6 (>= 5); however:
  Package libstdc++6 is not installed.
 siril depends on libswresample2 (>= 7:3.2.10); however:
  Package libswresample2 is not installed.
 siril depends on libswscale4 (>= 7:3.2.10); however:
  Package libswscale4 is not installed.
 siril depends on libtiff5 (>= 4.0.3); however:
  Package libtiff5 is not installed.
 siril depends on librsvg2-2; however:
  Package librsvg2-2 is not installed.

dpkg: error processing package siril (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 siril

• And then I went ahead and straight copied files from .deb package to proper directories and when I launch the application, I'm getting this error (in the console): siril: error while loading shared libraries: libraw.so.15: cannot open shared object file: No such file or directory, which is weird because I have libraw installed on my computer.

So how can I install this program?