diff --git a/workflow/qhtcp-workflow b/workflow/qhtcp-workflow
index 6cde3ffc..58fe0b42 100755
--- a/workflow/qhtcp-workflow
+++ b/workflow/qhtcp-workflow
@@ -433,7 +433,7 @@ install_dependencies() {
   depends_r=(BiocManager ontologyIndex ggrepel tidyverse sos openxlsx ggplot2 
     plyr extrafont gridExtra gplots stringr plotly ggthemes pandoc rmarkdown
     plotly htmlwidgets)
-  depends_bioc=(org.Sc.sgd.db)
+  depends_bioc=(UCSC.utils org.Sc.sgd.db)
 
   [[ $1 == "--get-depends" ]] && return 0 # if we just want to read the depends vars
 
@@ -478,9 +478,18 @@ install_dependencies() {
   }
   depends_r_to_string
   
-  debug "$RSCRIPT -e install.packages(c(\"$depends_r_str), dep=TRUE, repos=\"https://cloud.r-project.org\")"
-  "$RSCRIPT" -e "install.packages(c(\"$depends_r_str), dep=TRUE, repos=\"https://cloud.r-project.org\")"
-  "$RSCRIPT" -e "BiocManager::install(\"${depends_bioc[0]}\")"
+
+  # Install R packages
+  for d in "${depends_r[@]}"; do
+  debug "$RSCRIPT -e \"if (!require(\"$d\", quietly = TRUE)); install.packages(\"$d\", dep=TRUE, repos=\"https://cloud.r-project.org\")\""
+    "$RSCRIPT" -e "if (!require(\"$d\", quietly = TRUE)); install.packages(\"$d\", dep=TRUE, repos=\"https://cloud.r-project.org\")"
+  done
+
+  # Install Bioc packages
+  for d in "${depends_bioc[@]}"; do
+    debug "$RSCRIPT -e \"BiocManager::install(\"$d\")\""
+    "$RSCRIPT" -e "BiocManager::install(\"$d\")"
+  done
 
   hash "$MATLAB" &>/dev/null || echo "You will also need MATLAB installed for GUI modules"
 }