Bioconda as a channel depends on Conda Forge and so specifying bioconda as the only channel is incorrect. Instead, a proper specification for using the bioconda channel is

name: freebayes
channels:
  - conda-forge
  - bioconda
  - defaults
dependencies:
 - freebayes=1.3.6

See the channel configuration in the Usage section.

Answer from merv on Stack Overflow
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GitHub
github.com › idaholab › moose › discussions › 26822
Installation Issue: MOOSE Installation Fails on Linux Ubuntu 22.04.3 as libgcc-ng >=12 does not exist · idaholab/moose · Discussion #26822
Channels: - https://conda.software.inl.gov/public - defaults Platform: linux-64 Collecting package metadata (repodata.json): done Solving environment: failed LibMambaUnsatisfiableError: Encountered problems while solving: - nothing provides libgcc-ng >=12 needed by moose-wasp-2023.11.29-build_0 Could not solve for environment specs The following package could not be installed └─ moose-dev 2024.01.23** is not installable because it requires └─ moose-wasp 2023.11.29.* , which requires └─ libgcc-ng >=12 , which does not exist (perhaps a missing channel).
Author   idaholab
Discussions

unable to create conda environment
Hi, I was trying to install PhenoSV following the instruction in README but have encountered the issue to create conda environment when running conda env create --name phenosv --file phenosv.yml It seems like the packages in the phenosv.... More on github.com
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5
December 13, 2023
Cannot.Get.ChopperToRun
Hi, I am trying to run chopper on a University HPC cluster -With mamba install -c bioconda chopper I get Could not solve for environment specs The following package could not be installed └─ choppe... More on github.com
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1
September 10, 2024
python - PackagesNotFoundError: The following packages are not available from current channels (libgcc-ng and libstdcxx-ng) - Stack Overflow
I am trying to run the yml file but fail to solve the environment. The error is ResolvePackageNotFound: libgcc-ng libstdcxx-ng Then I tried conda installs conda install -c anaconda libgcc-ng conda More on stackoverflow.com
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installing qiime2 into windows 11
I am having trouble installing QIIME2 into Windows 11 with conda. I used the commands from the QIIME2 website: wget https://data.qiime2.org/distro/amplicon/qiime2-amplicon-2024.5-py38-linux-conda.yml conda env create -… More on forum.qiime2.org
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1
0
June 21, 2024
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Anaconda.org
anaconda.org › conda-forge › libgcc-ng
libgcc-ng - conda-forge | Anaconda.org
Install libgcc-ng with Anaconda.org. The GCC low-level runtime library
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GitHub
github.com › WGLab › PhenoSV › issues › 1
unable to create conda environment · Issue #1 · WGLab/PhenoSV
December 13, 2023 - Could not solve for environment specs The following packages are incompatible ├─ pybedtools 0.9.0** is installable with the potential options │ ├─ pybedtools 0.9.0 would require │ │ └─ libgcc-ng >=12 , which conflicts with any installable versions previously reported; │ ├─ pybedtools 0.9.0 would require │ │ └─ python >=3.6,<3.7.0a0 with the potential options │ │ ├─ python [3.6.0|3.6.1|...|3.6.9], which can be installed; │ │ └─ python [3.6.7|3.7.1] would require │ │ └─ openssl >=1.1.1,<1.1.2.0a0 , which does not exist (perhaps a missing ch
Author   WGLab
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Anaconda.org
anaconda.org › anaconda › libgcc-ng
libgcc-ng - anaconda | Anaconda.org
Install libgcc-ng with Anaconda.org. The GCC low-level runtime library
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GitHub
github.com › wdecoster › chopper › issues › 41
Cannot.Get.ChopperToRun · Issue #41 · wdecoster/chopper
September 10, 2024 - -With mamba install -c bioconda chopper I get Could not solve for environment specs The following package could not be installed └─ chopper is not installable because it requires └─ libgcc-ng >=12 , which does not exist (perhaps a missing channel).
Author   wdecoster
Find elsewhere
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GitHub
github.com › conda-forge › conda-forge.github.io › issues › 763
Cannot install python=3.7 on Linux (libgcc-ng missing?) · Issue #763 · conda-forge/conda-forge.github.io
July 26, 2021 - Manually digging into this, it looks like libgcc-ng and libstdcxx-ng are both missing from the repodata.json file. When I run conda create -n test sqlite, this installs sqlite 3.22.0, which seems to be the lates tversion of sqlite on conda-forge without an explicit dependency on libgcc-ng, so it looks like a missing libgcc-ng might be the problem?
Author   conda-forge
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Prefix.dev
prefix.dev › channels › conda-forge › packages › libgcc-ng
libgcc-ng - conda-forge
A community led collection of recipes, build infrastructure and distributions for the conda package manager.
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GitHub
github.com › conda › conda-build › issues › 5876
Conda build not querying the channels passed on the command line (for host environment) · Issue #5876 · conda/conda-build
December 9, 2025 - # packages in environment at /opt/conda: # # Name Version Build Channel _libgcc_mutex 0.1 conda_forge conda-forge _openmp_mutex 4.5 2_gnu conda-forge anaconda-cli-base 0.6.0 pyhd8ed1ab_0 conda-forge anaconda-client 1.13.1 pyhcf101f3_0 conda-forge annotated-types 0.7.0 pyhd8ed1ab_1 conda-forge archspec 0.2.5 pyhd8ed1ab_0 conda-forge attrs 25.4.0 pyh71513ae_0 conda-forge beautifulsoup4 4.14.3 pyha770c72_0 conda-forge boltons 25.0.0 pyhd8ed1ab_0 conda-forge brotli-python 1.2.0 py312hdb49522_1 conda-forge bzip2 1.0.8 hda65f42_8 conda-forge c-ares 1.34.5 hb9d3cd8_0 conda-forge ca-certificates 2025.
Author   conda
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Intel Community
community.intel.com › t5 › Intel-Distribution-for-Python › Cannot-install-tensorflow-2-14-0-from-Intel-conda-channel › m-p › 1551469
Solved: Re: Cannot install tensorflow 2.14.0 from Intel conda channel - Intel Community
December 8, 2023 - Could not solve for environment specs The following package could not be installed └─ tensorflow 2.14.0** is not installable because it requires └─ flatbuffers >=23.5.26 , which does not exist (perhaps a missing channel).
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GitHub
github.com › conda › conda › issues › 11673
conda create UnsatisfiableError for multiple packages doesn't show real error · Issue #11673 · conda/conda
July 29, 2022 - Press CTRL-C to abort. failed UnsatisfiableError: The following specifications were found to be incompatible with each other: Output in format: Requested package -> Available versions Package libgcc-ng conflicts for: pytest -> python[version='>=3.7,<3.8.0a0'] -> libgcc-ng[version='>=7.2.0|>=7.3.0|>=7.5.0'] libgcc-ng=11.2.0
Author   conda
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GitHub
github.com › bioconda › bioconda-recipes › issues › 11083
unicycler 0.4.6: Dependencies missing libgcc-ng and libstdcxx-ng · Issue #11083 · bioconda/bioconda-recipes
September 26, 2018 - conda create -n unicycler-0.4.6 unicycler=0.4.6 Fetching package metadata ............... Solving package specifications: PackageNotFoundError: Dependencies missing in current linux-64 channels: - unicycler 0.4.6* -> libgcc-ng >=7.3.0 - unicycler 0.4.6* -> libstdcxx-ng >=7.3.0 (and similarly for the other packages)
Author   bioconda
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GitHub
github.com › v-iashin › video_features › issues › 133
Error while trying to create env using .yml file · Issue #133 · v-iashin/video_features
I get the following error in running: conda env create -f conda_env.yml - pytorch - nvidia - conda-forge - defaults Platform: win-64 Collecting package metadata (repodata.json): done Solving environment: failed Channels: - pytorch - nvid...
Author   v-iashin
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Reddit
reddit.com › r/codinghelp › running into error when installing conda package
r/CodingHelp on Reddit: Running Into Error When Installing Conda Package
April 27, 2025 -

Hi!! I need to install the Proteinortho package (Proteinortho | Anaconda.org) on Miniconda3 to process bioinformatics data. Since the package is only compatible on Linux/MacOS systems (?), I am doing this through Ubuntu WSL. Whenever I run the command to install, this is what happens:

(base) jeannedng@LAPTOP-GE36OC36:~$ conda install bioconda::proteinortho

Channels:

- defaults

- bioconda

Platform: linux-64

Collecting package metadata (repodata.json): done

Solving environment: failed

LibMambaUnsatisfiableError: Encountered problems while solving:

- nothing provides openmp needed by proteinortho-6.0-py27pl526h9ad8f1e_0

Could not solve for environment specs

The following packages are incompatible

└─ proteinortho =* * is not installable because there are no viable options

├─ proteinortho [6.0|6.0.1|...|6.0b] would require

│ └─ openmp =* *, which does not exist (perhaps a missing channel);

├─ proteinortho 6.0.23 would require

│ └─ liblapacke >=3.8.0,<3.9.0a0 *, which does not exist (perhaps a missing channel);

├─ proteinortho [6.0.24|6.0.25|...|6.0.33] would require

│ └─ liblapacke >=3.8.0,<4.0a0 *, which does not exist (perhaps a missing channel);

├─ proteinortho [6.0.34|6.0.35|...|6.3.5] would require

│ └─ blis =* *, which does not exist (perhaps a missing channel);

└─ proteinortho 6.3.5 would require

└─ libgfortran =* *, which does not exist (perhaps a missing channel).

I apologize if I use terminologies wrong, I am not an IT student nor have any solid background on coding. Let me know what I am doing wrong and what I should be doing. Thank you!

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Anaconda
anaconda.org › cctbx202105 › libgcc-ng
Anaconda.org
A community-led collection of recipes, build infrastructure, and distributions for the conda package manager · The packages on this channel are covered by the Anaconda repository Terms of Service. Among other things, the ToS prohibits heavy commercial use and mirroring by any third party for ...