heroku-20.config.log

$ vips --vips-version
libvips 8.13.0-Thu Jul 21 13:59:28 UTC 2022

$ vips --vips-config
enable debug: no
enable deprecated library components: yes
enable modules: no
use fftw3 for FFT: yes
accelerate loops with orc: yes
ICC profile support with lcms: yes (lcms2)
zlib: yes
text rendering with pangocairo: yes
font file support with fontconfig: yes
RAD load/save: yes
Analyze7 load/save: yes
PPM load/save: yes
GIF load:  yes
GIF save with cgif: no
EXIF metadata support with libexif: yes
JPEG load/save with libjpeg: yes (pkg-config)
JXL load/save with libjxl: no (dynamic module: no)
JPEG2000 load/save with libopenjp2: no
PNG load with libspng: no
PNG load/save with libpng: yes (pkg-config libpng >= 1.2.9)
selected quantisation package: 
TIFF load/save with libtiff: yes (pkg-config libtiff-4)
image pyramid save: yes
HEIC/AVIF load/save with libheif: yes (dynamic module: no)
WebP load/save with libwebp: yes
PDF load with PDFium:  no
PDF load with poppler-glib: yes (dynamic module: no)
SVG load with librsvg-2.0: yes
EXR load with OpenEXR: yes
OpenSlide load: no (dynamic module: no)
Matlab load with matio: no
NIfTI load/save with niftiio: no
FITS load/save with cfitsio: no
Magick package: MagickCore (dynamic module: no)
Magick API version: magick6
load with libMagickCore: yes
save with libMagickCore: yes