Comment # 20 on bug 1220818 from Martin Wilck

The issue still occurs with ZYPP_SINGLE_RPMTRANS=1, even with 
ImageMagick-7.1.1.29-5.1, which contains the workaround from comment 7.

# zypper se -s ImageMagick
Loading repository data...
Reading installed packages...

S  | Name                      | Type    | Version      | Arch   | Repository
---+---------------------------+---------+--------------+--------+----------------------
i+ | ImageMagick               | package | 7.1.1.26-1.6 | x86_64 | (System
Packages)
v  | ImageMagick               | package | 7.1.1.29-5.1 | x86_64 | Main
Repository (OSS)
i+ | ImageMagick-config-7-SUSE | package | 7.1.1.26-1.6 | x86_64 | (System
Packages)

# zypper dup 
Loading repository data...
Reading installed packages...
[TechPreview] $ZYPP_SINGLE_RPMTRANS=1 : New rpm install backend is enabled
...
Verifying ...[done]
(   0/2630) Executing pretrans script for: filesystem-84.87-15.3.x86_64
...[done]
(   0/2630) Executing pretrans script for: sssd-2.9.4-2.2.x86_64 ...[done]
Preparing ...[done]
Problem occurred during or after installation or removal of packages:
Executing the transaction failed because of the following problems:
    file /etc/ImageMagick-7 from install of ImageMagick-7.1.1.29-5.1.x86_64
conflicts with file from package ImageMagick-config-7-SUSE-7.1.1.26-1.6.x86_64
    file /usr/libexec/virtiofsd from install of virtiofsd-1.10.1-4.2.x86_64
conflicts with file from package virtiofsd-1.10.1-2.1.x86_64

Maybe the update-alternatives call should be moved to %pretrans? Not sure if
it's allowed to require update-alternatives in %pretrans, though.