-# Install build dependencies provided in base distribution
-RUN yum -q -y install make automake gcc gcc-c++ libyaml-devel patch readline-devel zlib-devel libffi-devel openssl-devel bzip2 libtool bison sqlite-devel rpm-build git perl-ExtUtils-MakeMaker libattr-devel nss-devel libcurl-devel which tar unzip scl-utils centos-release-scl postgresql-devel python-devel python-setuptools fuse-devel xz-libs git
+# Install dependencies.
+RUN yum -q -y install make automake gcc gcc-c++ libyaml-devel patch readline-devel zlib-devel libffi-devel openssl-devel bzip2 libtool bison sqlite-devel rpm-build git perl-ExtUtils-MakeMaker libattr-devel nss-devel libcurl-devel which tar unzip scl-utils centos-release-scl postgresql-devel python-devel python-setuptools fuse-devel xz-libs git python-virtualenv wget
+
+# Install RVM
+ADD generated/mpapis.asc /tmp/
+ADD generated/pkuczynski.asc /tmp/
+RUN gpg --import --no-tty /tmp/mpapis.asc && \
+ gpg --import --no-tty /tmp/pkuczynski.asc && \
+ curl -L https://get.rvm.io | bash -s stable && \
+ /usr/local/rvm/bin/rvm install 2.5 && \
+ /usr/local/rvm/bin/rvm alias create default ruby-2.5 && \
+ /usr/local/rvm/bin/rvm-exec default gem install fpm --version 1.10.2
+
+# Install Bash 4.4.12 // see https://dev.arvados.org/issues/15612
+RUN cd /usr/local/src \
+&& wget http://ftp.gnu.org/gnu/bash/bash-4.4.12.tar.gz \
+&& wget http://ftp.gnu.org/gnu/bash/bash-4.4.12.tar.gz.sig \
+&& tar xzf bash-4.4.12.tar.gz \
+&& cd bash-4.4.12 \
+&& ./configure --prefix=/usr/local/$( basename $( pwd ) ) \
+&& make \
+&& make install \
+&& ln -sf /usr/local/src/bash-4.4.12/bash /bin/bash