title: Conda fails to build, when inside docker container
body: <p>I am trying to build a docker image. This is the full dockerfile:</p>
  <pre><code>FROM ubuntu
  
  ENV LANG=C.UTF-8 LC_ALL=C.UTF-8
  ENV PATH /opt/conda/bin:$PATH
  
  ENV TZ=Europe/Athens
  RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime &amp;&amp; echo $TZ &gt; /etc/timezone
  
  RUN apt-get update --fix-missing &amp;&amp; apt-get install -y wget bzip2 ca-certificates \
      libglib2.0-0 libxext6 libsm6 libxrender1 \
      git mercurial subversion
  
  RUN wget --quiet https://repo.anaconda.com/miniconda/Miniconda2-4.5.11-Linux-x86_64.sh -O ~/miniconda.sh &amp;&amp; \
      /bin/bash ~/miniconda.sh -b -p /opt/conda &amp;&amp; \
      rm ~/miniconda.sh &amp;&amp; \
      ln -s /opt/conda/etc/profile.d/conda.sh /etc/profile.d/conda.sh &amp;&amp; \
      echo &quot;. /opt/conda/etc/profile.d/conda.sh&quot; &gt;&gt; ~/.bashrc &amp;&amp; \
      echo &quot;conda activate base&quot; &gt;&gt; ~/.bashrc
  
  RUN apt-get install -y curl grep sed dpkg &amp;&amp; \
      TINI_VERSION=`curl https://github.com/krallin/tini/releases/latest | grep -o &quot;/v.*\&quot;&quot; | sed 's:^..\(.*\).$:\1:'` &amp;&amp; \
      curl -L &quot;https://github.com/krallin/tini/releases/download/v${TINI_VERSION}/tini_${TINI_VERSION}.deb&quot; &gt; tini.deb &amp;&amp; \
      dpkg -i tini.deb &amp;&amp; \
      rm tini.deb &amp;&amp; \
      apt-get clean
  
  ENTRYPOINT [ &quot;/usr/bin/tini&quot;, &quot;--&quot; ]
  CMD [ &quot;/bin/bash&quot; ]
  
  #SECOND PART
  RUN apt install -y libgl1-mesa-glx
  RUN conda install conda-build
  RUN apt-get install -y git
  WORKDIR /
  RUN git clone https://github.com/cadquery/cadquery.git
  WORKDIR /cadquery
  RUN conda env create -n cq -f environment.yml
  RUN echo &quot;source activate cq&quot; &gt; ~/.bashrc
  ENV PATH /opt/conda/envs/cq/bin:$PATH
  WORKDIR /testing
  </code></pre>
  <p>However, when it is time to conda build - more specifically on STEP 12, this line here:</p>
  <pre><code>RUN conda install conda-build
  </code></pre>
  <p>i get errors.</p>
  <p>It seems to be installing the packages normally, then it fails.:</p>
  <pre><code>Proceed ([y]/n)? 
  ruamel_yaml-0.15.100 | 268 KB    | ########## | 100% 
  readline-8.1         | 464 KB    | ########## | 100% 
  bzip2-1.0.8          | 105 KB    | ########## | 100% 
  tzdata-2020f         | 123 KB    | ########## | 100% 
  xz-5.2.5             | 438 KB    | ########## | 100% 
  tk-8.6.10            | 3.2 MB    | ########## | 100% 
  conda-build-3.21.4   | 585 KB    | ########## | 100% 
  cffi-1.14.5          | 227 KB    | ########## | 100% 
  ld_impl_linux-64-2.3 | 645 KB    | ########## | 100% 
  urllib3-1.26.4       | 99 KB     | ########## | 100% 
  pyyaml-5.4.1         | 180 KB    | ########## | 100% 
  pip-21.1.1           | 2.0 MB    | ########## | 100% 
  lz4-c-1.9.3          | 216 KB    | ########## | 100% 
  beautifulsoup4-4.9.3 | 86 KB     | ########## | 100% 
  python-3.9.5         | 22.7 MB   | ########## | 100% 
  pkginfo-1.7.0        | 42 KB     | ########## | 100% 
  tqdm-4.59.0          | 90 KB     | ########## | 100% 
  setuptools-52.0.0    | 880 KB    | ########## | 100% 
  python-libarchive-c- | 50 KB     | ########## | 100% 
  cryptography-3.4.7   | 1.0 MB    | ########## | 100% 
  icu-58.2             | 22.7 MB   | ########## | 100% 
  pysocks-1.7.1        | 31 KB     | ########## | 100% 
  libxml2-2.9.10       | 1.3 MB    | ########## | 100% 
  certifi-2020.12.5    | 143 KB    | ########## | 100% 
  openssl-1.1.1k       | 3.8 MB    | ########## | 100% 
  libgcc-ng-9.1.0      | 8.1 MB    | ########## | 100% 
  patchelf-0.12        | 92 KB     | ########## | 100% 
  glob2-0.7            | 12 KB     | ########## | 100% 
  idna-2.10            | 52 KB     | ########## | 100% 
  liblief-0.10.1       | 2.0 MB    | ########## | 100% 
  pycparser-2.20       | 94 KB     | ########## | 100% 
  chardet-4.0.0        | 198 KB    | ########## | 100% 
  py-lief-0.10.1       | 1.3 MB    | ########## | 100% 
  markupsafe-2.0.1     | 22 KB     | ########## | 100% 
  zlib-1.2.11          | 120 KB    | ########## | 100% 
  wheel-0.36.2         | 31 KB     | ########## | 100% 
  conda-4.10.1         | 3.1 MB    | ########## | 100% 
  libffi-3.3           | 54 KB     | ########## | 100% 
  yaml-0.2.5           | 87 KB     | ########## | 100% 
  libarchive-3.4.2     | 1.6 MB    | ########## | 100% 
  ca-certificates-2021 | 120 KB    | ########## | 100% 
  conda-package-handli | 967 KB    | ########## | 100% 
  filelock-3.0.12      | 10 KB     | ########## | 100% 
  requests-2.25.1      | 51 KB     | ########## | 100% 
  ncurses-6.2          | 1.1 MB    | ########## | 100% 
  pytz-2021.1          | 244 KB    | ########## | 100% 
  pycosat-0.6.3        | 108 KB    | ########## | 100% 
  psutil-5.8.0         | 342 KB    | ########## | 100% 
  sqlite-3.35.4        | 1.4 MB    | ########## | 100% 
  zstd-1.4.9           | 809 KB    | ########## | 100% 
  jinja2-3.0.0         | 99 KB     | ########## | 100% 
  brotlipy-0.7.0       | 349 KB    | ########## | 100% 
  ripgrep-12.1.1       | 1.5 MB    | ########## | 100% 
  _libgcc_mutex-0.1    | 3 KB      | ########## | 100% 
  six-1.15.0           | 13 KB     | ########## | 100% 
  soupsieve-2.2.1      | 30 KB     | ########## | 100% 
  pyopenssl-20.0.1     | 48 KB     | ########## | 100% 
  
  Downloading and Extracting Packages
  
  UnicodeDecodeError('ascii', '/info/test/tests/data/\xed\x94\x84\xeb\xa1\x9c\xea\xb7\xb8\xeb\x9e\xa8.zip.json', 22, 23, 'ordinal not in range(128)')
  
  
  The command '/bin/sh -c conda install conda-build' returned a non-zero code: 1
  </code></pre>