debian stretch upgrade has made gnucash unworkable

[tjoen]

Problem is that Guile-2.0 files conflicts with the newer Guile-2.2
Debian shoud have created a tiny Guile-2.0 package containing only
/usr/lib64/guile/2.0/*
/usr/lib64/libguile-2.0.so.22
/usr/lib64/libguile-2.0.so.22.8.1
/usr/lib64/libguilereadline-v-18.so.18
/usr/lib64/libguilereadline-v-18.so.18.0.0
/usr/share/guile/2.0/*

OP can compile and install it in /usr/local/