electrum yields the following error on startup:

	> electrum 
	Error: No module named 'qrcode'. Try 'sudo pip install <module-name>'

python-qrcode is correctly specified as input in the package's
declaration:

--8<---------------cut here---------------start------------->8---
> guix package --show=electrum
name: electrum
version: 3.0.5
outputs: out
systems: x86_64-linux i686-linux armhf-linux aarch64-linux
dependencies: python-dnspython-1.15.0 python-ecdsa-0.13 python-jsonrpclib-pelix-0.3.1 python-pbkdf2-1.3 python-protobuf-3.5.2 python-pyaes-1.6.1 python-pyqt-5.9 python-pysocks-1.6.7
+ python-qrcode-6.0 python-requests-2.13.0 python-sip-4.19.3
location: gnu/packages/finance.scm:275:2
homepage: https://electrum.org/
license: Expat
synopsis: Bitcoin wallet  
description: Electrum is a lightweight Bitcoin client, based on a client-server protocol.  It supports Simple Payment Verification (SPV) and deterministic key generation from a seed.  Your
+ secret keys are encrypted and are never sent to other machines/servers.  Electrum does not download the Bitcoin blockchain.
--8<---------------cut here---------------end--------------->8---

Any clue?

-- 
Pierre Neidhardt

Statistics means never having to say you're certain.