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path: root/cran_multithread.patch
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diff --git a/dependencies/common/install-packages b/dependencies/common/install-packages
index e0d184e5f0..658fd31fd4 100755
--- a/dependencies/common/install-packages
+++ b/dependencies/common/install-packages
@@ -104,7 +104,7 @@ fi
 
 # install packages needed to run tests
 for RPKG in rmarkdown renv testthat xml2 yaml; do
-    RINSTALLCMD="if("'!'"require($RPKG, quietly = TRUE)) { install.packages('$RPKG', lib='$RPKGLIB', repos='https://cran.rstudio.com/') }"
+    RINSTALLCMD="if("'!'"require($RPKG, quietly = TRUE)) { options(Ncpus = @@proc_num@@ ); install.packages('$RPKG', lib='$RPKGLIB', repos='https://cran.rstudio.com/') }"
     echo "> $RINSTALLCMD"
     Rscript -e "$RINSTALLCMD"
 done