I have just invested very few pennies in a Raspian machine hosted by my ISP.
The machine tells me: root@www:~# cat /etc/os-release PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" NAME="Raspbian GNU/Linux" VERSION_ID="10" VERSION="10 (buster)" VERSION_CODENAME=buster ID=raspbian So I have added a line to /etc/apt/sources.list root@www:~# cat /etc/apt/sources.list deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi deb http://archive.raspberrypi.org/debian/ buster main deb http://cloud.r-project.org/bin/linux/debian buster-cran40/ root@www:~# and added the key using apt-key adv --keyserver keys.gnupg.net --recv-key 'E19F5F87128899B192B1A2C2AD5F960A256A04AF' following https://cran.r-project.org/bin/linux/debian/#debian-buster-stable apt-get update runs fine but apt install -t buster-cran40 r-base gets me this: root@www:~# apt install -t buster-cran40 r-base Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: r-base : Depends: r-base-core (>= 4.0.4-1~bustercran.0) but it is not going to be installed Depends: r-recommended (= 4.0.4-1~bustercran.0) but it is not going to be installed Recommends: r-base-html but it is not going to be installed Recommends: r-doc-html but it is not going to be installed E: Unable to correct problems, you have held broken packages. aptitude why-not r-base says: root@www:~# aptitude why-not r-base Not currently installed The candidate version 4.0.4-1~bustercran.0 has priority optional No dependencies require to remove r-base and aptitude install r-base says root@www:~# aptitude install r-base The following NEW packages will be installed: gfortran{a} gfortran-8{a} icu-devtools{a} libblas-dev{a} libblas3{a} libbz2-dev{a} libdrm-amdgpu1{a} libdrm-common{a} libdrm-nouveau2{a} libdrm-radeon1{a} libdrm2{a} libfile-basedir-perl{a} libfile-desktopentry-perl{a} libfile-mimeinfo-perl{a} libfontenc1{a} libgfortran-8-dev{a} libgfortran4{a} libgfortran5{a} libgl1{a} libgl1-mesa-dri{a} libglapi-mesa{a} libglvnd0{a} libglx-mesa0{a} libglx0{a} libicu-dev{a} libio-stringy-perl{a} libipc-system-simple-perl{a} libjpeg-dev{a} libjpeg62-turbo-dev{a} liblapack-dev{a} liblapack3{a} libllvm9{a} liblzma-dev{a} libncurses-dev{a} libncurses5-dev{a} libnet-dbus-perl{a} libpcre16-3{a} libpcre2-16-0{a} libpcre2-32-0{a} libpcre2-dev{a} libpcre2-posix0{a} libpcre3-dev{a} libpcre32-3{a} libpcrecpp0v5{a} libpng-dev{a} libpng-tools{a} libreadline-dev{a} libsensors-config{a} libsensors5{a} libtcl8.6{a} libtie-ixhash-perl{a} libtk8.6{a} libx11-protocol-perl{a} libxaw7{a} libxcb-dri2-0{a} libxcb-dri3-0{a} libxcb-glx0{a} libxcb-present0{a} libxcb-shape0{a} libxcb-sync1{a} libxml-parser-perl{a} libxml-twig-perl{a} libxml-xpathengine-perl{a} libxmu6{a} libxshmfence1{a} libxss1{a} libxv1{a} libxxf86dga1{a} libxxf86vm1{a} pkg-config{a} r-base{b} r-base-core{a} r-base-dev{ab} r-base-html{a} r-cran-boot{ab} r-cran-class{a} r-cran-cluster{a} r-cran-codetools{ab} r-cran-foreign{a} r-cran-kernsmooth{a} r-cran-lattice{a} r-cran-mass{a} r-cran-matrix{a} r-cran-mgcv{a} r-cran-nlme{a} r-cran-nnet{a} r-cran-rpart{a} r-cran-spatial{a} r-cran-survival{a} r-doc-html{a} r-recommended{ab} unzip{a} x11-utils{a} x11-xserver-utils{a} xdg-utils{a} zip{a} zlib1g-dev{a} 0 packages upgraded, 97 newly installed, 0 to remove and 0 not upgraded. Need to get 1,812 kB/89.4 MB of archives. After unpacking 716 MB will be used. The following packages have unmet dependencies: r-cran-boot : Depends: r-base-core (>= 4.0.4-1~bustercran.0) but 3.5.2-1 is to be installed Depends: r-api-4.0 which is a virtual package and is not provided by any available package r-cran-codetools : Depends: r-base-core (>= 4.0.4-1~bustercran.0) but 3.5.2-1 is to be installed Depends: r-api-4.0 which is a virtual package and is not provided by any available package r-base : Depends: r-base-core (>= 4.0.4-1~bustercran.0) but 3.5.2-1 is to be installed r-recommended : Depends: r-base-core (>= 4.0.4-1~bustercran.0) but 3.5.2-1 is to be installed r-base-dev : Depends: r-base-core (>= 4.0.4-1~bustercran.0) but 3.5.2-1 is to be installed The following actions will resolve these dependencies: Keep the following packages at their current version: 1) r-base [Not Installed] 2) r-base-dev [Not Installed] 3) r-cran-boot [Not Installed] 4) r-cran-codetools [Not Installed] 5) r-recommended [Not Installed] Leave the following dependencies unresolved: 6) r-base-core recommends r-recommended 7) r-base-core recommends r-base-dev I assume that I have some part of R 3.5.? stuck in the apt system from previously installing R from the default raspian repositories (stupid of me). There is nothing in /usr/lib/R (no directory) nor does /usr/bin/R exist and I have (in desperation: not something I remember doing often with Debian machines) even rebooted the machine but no change. I could wipe the machine and start over and not install R until after adding the buster line deb http://cloud.r-project.org/bin/linux/debian buster-cran40/ to /etc/apt/sources.list and doing apt-get update However, I thought I'd check things out here first. Thanks in advance for any suggestions. Chris -- Small contribution in our coronavirus rigours: https://www.coresystemtrust.org.uk/home/free-options-to-replace-paper-core-forms-during-the-coronavirus-pandemic/ Chris Evans <ch...@psyctc.org> Visiting Professor, University of Sheffield <chris.ev...@sheffield.ac.uk> I do some consultation work for the University of Roehampton <chris.ev...@roehampton.ac.uk> and other places but <ch...@psyctc.org> remains my main Email address. I have a work web site at: https://www.psyctc.org/psyctc/ and a site I manage for CORE and CORE system trust at: http://www.coresystemtrust.org.uk/ I have "semigrated" to France, see: https://www.psyctc.org/pelerinage2016/semigrating-to-france/ https://www.psyctc.org/pelerinage2016/register-to-get-updates-from-pelerinage2016/ If you want an Emeeting, I am trying to keep them to Thursdays and my diary is at: https://www.psyctc.org/pelerinage2016/ceworkdiary/ Beware: French time, generally an hour ahead of UK. _______________________________________________ R-SIG-Debian mailing list R-SIG-Debian@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-debian