diff --git a/README.md b/README.md
index caf9082..d1b358a 100644
--- a/README.md
+++ b/README.md
@@ -80,140 +80,7 @@ VIPS_VERSION=x.y.z ./build.sh
 
 After building a tar file, it will be copied to the `build` directory. Then you should commit this changes to git.
 
-## Build configuration (heroku-18)
+## Build configurations
 
-```
-~ $ vips --vips-version
-libvips 8.12.2-Tue Jan 25 09:34:32 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: no
-font file support with fontconfig:
-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)
-quantisation to 8 bit: no
-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
-```
-
-## Build configuration (heroku-20)
+If you would like to see the output of `vips --vips-version` or `vips --vips-config`, both can be found for each stack in the [build/configurations](build/configurations) directory. These configuration logs are generated automatically during the build process, so they should always be up-to-date.
 
-```
-~ $ vips --vips-version
-libvips 8.12.2-Tue Jan 25 09:34:32 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: no
-font file support with fontconfig:
-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)
-quantisation to 8 bit: no
-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
-```
-
-## Build configuration (heroku-22)
-
-```
-~ $ vips --vips-version
-libvips 8.12.2-Tue Jan 25 09:34:32 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: no
-font file support with fontconfig:
-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: yes
-PNG load with libspng: no
-PNG load/save with libpng: yes (pkg-config libpng >= 1.2.9)
-quantisation to 8 bit: no
-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
-```