* installing *source* package ‘sparselu’ ...
** this is package ‘sparselu’ version ‘0.2.0’
** package ‘sparselu’ successfully unpacked and MD5 sums checked
** using staged installation
configure: error: Unable to determine SuiteSparse/UMFPACK linker flags.
Set the environment variables PKG_LIBS or SUITESPARSE_HOME before installing,
or make sure pkg-config can find the 'umfpack' module.
ERROR: configuration failed for package ‘sparselu’
* removing ‘/Volumes/Builds/packages/big-sur-arm64/results/4.5/sparselu.Rcheck/sparselu’