installing package from github throws ssh error and then libssh

For a project I want to run in RStudio Cloud, I tried to install a package from github, i.e.

# install.packages("remotes")

I ended up with an error message that the package ssh is not installed. Installing ssh delivered the following error message pointing to libssh and path configuration. As a mid-level R&Studio-user and novice user of RStudio Cloud, I have reached my limits here.

Can anybody help?
How can/could I install the required ssh package and supporting libssh or how can I configure the PKG_CONFIG_PATH environment variable,etc.?

Installing package into ‘/home/rstudio-user/R/x86_64-pc-linux-gnu-library/3.6’
(as ‘lib’ is unspecified)
trying URL 'http://package-proxy/src/contrib/ssh_0.6.tar.gz'
Content type 'application/x-gzip' length 1048187 bytes (1023 KB)
downloaded 1023 KB

  • installing source package ‘ssh’ ...
    ** package ‘ssh’ successfully unpacked and MD5 sums checked
    ** using staged installation
    Package libssh was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libssh.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libssh' found
    ./configure: 33: ./configure: [[: not found
    Using PKG_CFLAGS=
    Using PKG_LIBS=-lssh
    ------------------------- ANTICONF ERROR ---------------------------
    Configuration failed because libssh was not found. Try installing:
  • deb: libssh-dev (Debian, Ubuntu, etc)
  • rpm: libssh-devel (Fedora, EPEL)
  • brew: libssh (OSX)
    If libssh is already installed, check that 'pkg-config' is in your
    PATH and PKG_CONFIG_PATH contains a libssh.pc file. If pkg-config
    is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:
    R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'

ERROR: configuration failed for package ‘ssh’

  • removing ‘/home/rstudio-user/R/x86_64-pc-linux-gnu-library/3.6/ssh’
    Warning in install.packages :
    installation of package ‘ssh’ had non-zero exit status

The downloaded source packages are in

You are not able to install system dependencies. We will take a look at whether or not it makes sense to add libssh-dev to the base image, and if so, it will become available in the next quarterly update of the base image.

Thanks, Josh for coming back on this. I try to work locally on my laptop for the time being.

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