Install error about q2-picrust2==2019.7

Hello guys!
I just installed q2-picrust2==2019.7 plugin with conda but it seems having some error!

conda install q2-picrust2=2019.7 -c conda-forge -c bioconda -c gavinmdouglas -v(in conda envs “qiime2-2019.7”)

Collecting package metadata: …working… done
Solving environment: …working…
The environment is inconsistent, please check the package plan carefully
The following packages are causing the inconsistency:

** - gavinmdouglas/noarch::q2-picrust2==2019.7=py36_0**

then the link_precs change to
and installed a strange package
picrust2 bioconda/noarch::picrust2-2.2.0_b-py_0

the Executing transaction:just stuck at
===> LINKING PACKAGE: bioconda::picrust2-2.2.0_b-py_0 <===
** prefix=/home/u4040/miniconda3/envs/qiime2-2019.7**
** source=/home/u4040/miniconda3/pkgs/picrust2-2.2.0_b-py_0**

it seems like a bug.
Does anyone have the same error? Or just me?:expressionless: