On Sat, 18 Jul 2020, José Abílio Matos wrote: As an example: Installing package into ‘/usr/lib64/R/library’ (as ‘lib’ is unspecified) --- Please select a CRAN mirror for use in this session --- also installing the dependencies ‘crosstalk’, ‘rgl’ trying URL 'https://packages.othr.de/cran/src/contrib/crosstalk_1.1.0.1.tar.gz' Content type 'text/plain' length 673125 bytes (657 KB) ================================================== downloaded 657 KB trying URL 'https://packages.othr.de/cran/src/contrib/rgl_0.100.54.tar.gz' Content type 'text/plain' length 2952743 bytes (2.8 MB) ================================================== downloaded 2.8 MB trying URL 'https://packages.othr.de/cran/src/contrib/matlib_0.9.3.tar.gz' Content type 'text/plain' length 220211 bytes (215 KB) ================================================== downloaded 215 KB * installing *source* package ‘crosstalk’ ... ** package ‘crosstalk’ successfully unpacked and MD5 sums checked ** using staged installation ** R ** inst ** byte-compile and prepare package for lazy loading Error: package ‘R6’ was installed before R 4.0.0: please re-install it Execution halted ERROR: lazy loading failed for package ‘crosstalk’ * removing ‘/usr/lib64/R/library/crosstalk’ ERROR: dependency ‘crosstalk’ is not available for package ‘rgl’ * removing ‘/usr/lib64/R/library/rgl’ ERROR: dependency ‘rgl’ is not available for package ‘matlib’ * removing ‘/usr/lib64/R/library/matlib’ The downloaded source packages are in ‘/tmp/Rtmpnvhegn/downloaded_packages’ Updating HTML index of packages in '.Library' Making 'packages.html' ... done Warning messages: 1: In install.packages("matlib") : installation of package ‘crosstalk’ had non-zero exit status 2: In install.packages("matlib") : installation of package ‘rgl’ had non-zero exit status 3: In install.packages("matlib") : installation of package ‘matlib’ had non-zero exit status R6 is available as a F32 RPM; however, it comes back w the above error message, fyi.   Thanks; I'll check this out. Max  

Consolidating our correspondance and answering your two questions ... On Sun, 19 Jul 2020, José Abílio Matos wrote: ip <- installed.packages() ip["R6", c(2,3,16)] LibPath Version Built "/usr/lib64/R/library" "2.4.1" "3.6.2" And separately you asked for the dnf info output pyz@pegasus ~> dnf info R-r6 Installed Packages Name : R-R6 Version : 2.4.1 Release : 4.fc32 Architecture : noarch Size : 80 k Source : R-R6-2.4.1-4.fc32.src.rpm Repository : @System From repo : updates Summary : Classes with Reference Semantics URL : http://cran.r-project.org/web/packages/R6/index.html License : MIT Description : The R6 package allows the creation of classes with reference semantics, : similar to R's built-in reference classes. Compared to reference classes, : R6 classes are simpler and lighter-weight, and they are not built on S4 : classes so they do not require the methods package. These classes allow : public and private members, and they support inheritance, even when the : classes are defined in different packages. fyi, M

On Sat, 18 Jul 2020, José Abílio Matos wrote: [deleted for the sake of brevity ] I got this far: when doing dnf install R-CRAN-matlib the command comes back with a boatload of dependencies, including the request to install R-CRAN-R6. R-R6 as an F32 rpm is already installed; there are other instances where an RPM-CRAN-* rpm is requested to be installed as a dependency when the comprable F32 rpm is already installed. This doesn't seem to be prudent. Max