diff --git a/README.md b/README.md
index d63e941..8a8df6c 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,11 @@ Various experiments to convert image files to avif
 
 ## Debian dependencies
 
-- libmagickcore-6-headers: /usr/include/ImageMagick-6/magick/MagickCore.h
+- imagemagick-6-common
+- libmagick++-6-headers
+- libmagickcore-6-arch-config
+- libmagickcore-6-headers
+- libmagickwand-6-headers
 
 ## Running it
 
@@ -14,3 +18,5 @@ Various experiments to convert image files to avif
 
 - Debian build from CPAN fails, can't find MagickCore.h
 - Install `libimage-magick-perl` for now
+- Image::Magick wants v7 but Debian has always shipped with v6 for
+  years; how was `libimage-magick-perl` built?