diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index baa5b32..5baf8e6 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -54,7 +54,7 @@ RUN set -eux; \
 	chmod -R ugo=rwX config db sqlite; \
 	find log tmp -type d -exec chmod 1777 '{}' +
 
-# build for musl-libc, not glibc
+# build for musl-libc, not glibc (see https://github.com/sparklemotion/nokogiri/issues/2075, https://github.com/rubygems/rubygems/issues/3174)
 ENV BUNDLE_FORCE_RUBY_PLATFORM 1
 RUN set -eux; \
 	\