Building nextcloud images fails on "creating libtool"

[bolet]

When building the nextcloud image:
.../22.0/fpm-alpine# docker build -t nextcloud:fpm-alpine .

Or nextcloud-full image (starting from a dockerhub nextcloud:fpm-alpine image):
.../.examples/dockerfiles/full/fpm-alpine# docker build -t nextcloud-full:fpm-alpine .

I get the following error at one point:

...
creating libtool
appending configuration tag "CXX" to libtool
configure: patching config.h.in
configure: creating ./config.status
config.status: creating config.h
make: /bin/sh: Operation not permitted
/bin/sh /usr/src/php/ext/bcmath/libtool --mode=compile ...
make: *** [Makefile:191: bcmath.lo] Error 127
OR
/bin/sh /usr/src/php/ext/bz2/libtool --mode=compile
make: *** [Makefile:192: bz2.lo] Error 127
...

This used to work for many releases till a few months ago.

In case it's useful: I'm running on a debian buster armv7 platform.

[J0WI]

Duplicate of docker-library/php#1177

TL;DR: upgrade do Docker 20.10.7+

[bolet]

The docker apt repo only provides 19.03.13 for debian buster armv7. Before looking for alternate ways to install a more recent docker version on the target server, I tried cross-building from my desktop amd64 (ubuntu docker 20.10.2), and it worked. For now I'll keep it that way. Thanks a lot for your help @J0WI !