How to fix conda "ResolvePackageNotFound" when building a conda recipe - build

Question

I downloaded a conda package from github to bring a few modifications and would like to build this local package in a conda environment and test my changes. The problem is that the building of the recipe fails because conda has a conda.exceptions.ResolvePackageNotFound error stating that it does not detect 2 packages, snakemake and fuzzywuzzy.
Here is the meta.yaml file:
package:
name: snakepipes
version: 1.2.1
source:
path: ../
build:
number: 0
noarch: python
requirements:
build:
- python >=3
run:
- python >=3
- pandas
- graphviz
- pyyaml >=5.1
- wget
- snakemake >=5.2.3
- fuzzywuzzy
test:
commands:
- DNA-mapping --help
about:
home: 'https://snakepipes.readthedocs.org'
license: GPL3
summary: NGS processing pipelines from the MPI-IE
license_file: LICENSE.txt
I tried to change the noarch into" generic", to add "pip" in the requirements: build category...
My command line is quite standard: conda build conda-recipe/.
The error message I get is always the same:
No numpy version specified in conda_build_config.yaml. Falling back to default numpy value of 1.11
WARNING:conda_build.metadata:No numpy version specified in conda_build_config.yaml. Falling back to default numpy value of 1.11
Adding in variants from internal_defaults
INFO:conda_build.variants:Adding in variants from internal_defaults
Attempting to finalize metadata for snakepipes
INFO:conda_build.metadata:Attempting to finalize metadata for snakepipes
Collecting package metadata: ...working... done
Solving environment: ...working... done
BUILD START: ['snakepipes-1.2.1-py_0.tar.bz2']
Collecting package metadata: ...working... done
Solving environment: ...working... done
Collecting package metadata: ...working... done
Solving environment: ...working... failed
Leaving build/test directories:
Work:
/home/remi/anaconda3/conda-bld/work
Test:
/home/remi/anaconda3/conda-bld/test_tmp
Leaving build/test environments:
Test:
source activate /home/remi/anaconda3/conda-bld/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac
Build:
source activate /home/remi/anaconda3/conda-bld/_build_env
Traceback (most recent call last):
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/environ.py", line 753, in get_install_actions
actions = install_actions(prefix, index, specs, force=True)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/common/io.py", line 88, in decorated
return f(*args, **kwds)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/plan.py", line 473, in install_actions
txn = solver.solve_for_transaction(prune=prune, ignore_pinned=not pinned)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 107, in solve_for_transaction
force_remove, force_reinstall)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 145, in solve_for_diff
force_remove)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 242, in solve_final_state
ssc = self._run_sat(ssc)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/common/io.py", line 88, in decorated
return f(*args, **kwds)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 475, in _run_sat
conflicting_specs = ssc.r.get_conflicting_specs(tuple(final_environment_specs))
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/resolve.py", line 852, in get_conflicting_specs
reduced_index = self.get_reduced_index(specs)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/common/io.py", line 88, in decorated
return f(*args, **kwds)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/resolve.py", line 356, in get_reduced_index
specs, features = self.verify_specs(specs)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda/resolve.py", line 244, in verify_specs
raise ResolvePackageNotFound(bad_deps)
conda.exceptions.ResolvePackageNotFound:
- fuzzywuzzy
- snakemake[version='>=5.2.3']
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/remi/anaconda3/bin/conda-build", line 11, in <module>
sys.exit(main())
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/cli/main_build.py", line 456, in main
execute(sys.argv[1:])
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/cli/main_build.py", line 447, in execute
verify=args.verify, variants=args.variants)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/api.py", line 208, in build
notest=notest, need_source_download=need_source_download, variants=variants)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/build.py", line 2314, in build_tree
notest=notest,
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/build.py", line 1397, in build
create_build_envs(m, notest)
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/build.py", line 1281, in create_build_envs
raise e
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/build.py", line 1271, in create_build_envs
channel_urls=tuple(m.config.channel_urls))
File "/home/remi/anaconda3/lib/python3.7/site-packages/conda_build/environ.py", line 755, in get_install_actions
raise DependencyNeedsBuildingError(exc, subdir=subdir)
conda_build.exceptions.DependencyNeedsBuildingError: Unsatisfiable dependencies for platform linux-64: {"snakemake[version='>=5.2.3']", 'fuzzywuzzy'}
Do you know how to fix this ?

Answer 1

The problem is that you need to add conda channels that have the appropriate packages. You can search at https://anaconda.org for channels that have the packages you need.
In this case, it seems like bioconda has the snakemake package and conda-forge has fuzzywuzzy so you should be able to do
conda build -c conda-forge -c bioconda conda-recipe/