diff --git a/action.yml b/action.yml
index 9d1475b7..eb301ae9 100644
--- a/action.yml
+++ b/action.yml
@@ -113,6 +113,8 @@ runs:
     - name: Build dependencies.log (and commit)
       if: env.IS_GIT_BEHIND != 'true'
       run: |
+        set -x  # turn on debugging
+
         # append permissive line to .gitignore since *.log is commonly present
         line='!dependencies*.log'
         if [[ ! $(grep -F "$line" .gitignore) ]]; then
@@ -133,12 +135,16 @@ runs:
 
         # Build
         if [ -f ./Dockerfile ]; then
-          # from docker...
-          $GITHUB_ACTION_PATH/install-podman.sh
-          podman --version
+          # install podman... (grep -o -> 1 if found)
+          if [[ $(grep -o "USER" ./Dockerfile) ]]; then
+            $GITHUB_ACTION_PATH/install-podman.sh
+            podman --version
+            USE_PODMAN='--podman'
+          fi
+          # from dockerfile...
           for f in ./Dockerfile*; do
               echo $f
-              ${{ github.action_path }}/build-dependencies-dockerfile-logs.sh $f
+              ${{ github.action_path }}/build-dependencies-dockerfile-logs.sh $f $USE_PODMAN
           done
         else
           # from setup.cfg...
diff --git a/build-dependencies-dockerfile-logs.sh b/build-dependencies-dockerfile-logs.sh
index 1ada263f..f87d3631 100755
--- a/build-dependencies-dockerfile-logs.sh
+++ b/build-dependencies-dockerfile-logs.sh
@@ -17,37 +17,76 @@ if [ ! -f "$1" ]; then
     exit 2
 fi
 
-DOCKER_DEPS="dependencies-from-$(basename $1).log"
 
-# use podman to get around user permission issues (with --userns=keep-id:uid=1000,gid=1000)
-podman build -t my_image --file $1 .
+# build
+if [ "$2" == "--podman" ]; then
+    # use podman to get around user permission issues (with --userns=keep-id:uid=1000,gid=1000)
+    podman build -t my_image --file $1 .
+else
+    docker build -t my_image --file $1 .
+fi
+
+
+PIP_FREEZE='pip_freeze.txt'
+PIP_DEP_TREE='pip_dep_tree.txt'
+
 
 # make script
 TEMPDIR="dep-build-$(basename $1)"
 mkdir ./$TEMPDIR
-echo "#!/bin/bash" >> ./$TEMPDIR/freezer.sh
-echo "pip3 freeze > /local/$TEMPDIR/$DOCKER_DEPS" >> ./$TEMPDIR/freezer.sh
-chmod +x ./$TEMPDIR/freezer.sh
+echo "#!/bin/bash" >> ./$TEMPDIR/make_dep_files.sh
+# PIP_FREEZE
+echo "pip3 freeze > /local/$TEMPDIR/$PIP_FREEZE" >> ./$TEMPDIR/make_dep_files.sh
+# PIP_DEP_TREE
+echo "pip3 install --target=. pipdeptree" >> ./$TEMPDIR/make_dep_files.sh
+echo "./bin/pipdeptree > /local/$TEMPDIR/$PIP_DEP_TREE" >> ./$TEMPDIR/make_dep_files.sh
+chmod +x ./$TEMPDIR/make_dep_files.sh
+
 
 # generate
-podman run --rm -i \
-    --mount type=bind,source=$(realpath ./$TEMPDIR/),target=/local/$TEMPDIR \
-    --userns=keep-id:uid=1000,gid=1000 \
-    my_image \
-    /local/$TEMPDIR/freezer.sh
+if [ "$2" == "--podman" ]; then
+    podman run --rm -i \
+        --mount type=bind,source=$(realpath ./$TEMPDIR/),target=/local/$TEMPDIR \
+        --userns=keep-id:uid=1000,gid=1000 \
+        my_image \
+        /local/$TEMPDIR/make_dep_files.sh
+else
+    docker run --rm -i \
+        --mount type=bind,source=$(realpath ./$TEMPDIR/),target=/local/$TEMPDIR \
+        my_image \
+        /local/$TEMPDIR/make_dep_files.sh
+fi
+
 
-# grab deps file
+# grab dep files
 # - remove main package since this can cause an infinite loop when a new release is made
 if [ ! -z "$PACKAGE_NAME" ]; then
-    sed -i "/^$PACKAGE_NAME==/d" ./$TEMPDIR/$DOCKER_DEPS
-    sed -i "/^$PACKAGE_NAME /d" ./$TEMPDIR/$DOCKER_DEPS
-    sed -i "/#egg=$PACKAGE_NAME$/d" ./$TEMPDIR/$DOCKER_DEPS
+    # PIP_FREEZE
+    sed -i "/^$PACKAGE_NAME==/d" ./$TEMPDIR/$PIP_FREEZE
+    sed -i "/^$PACKAGE_NAME /d" ./$TEMPDIR/$PIP_FREEZE
+    sed -i "/#egg=$PACKAGE_NAME$/d" ./$TEMPDIR/$PIP_FREEZE
     # now if using pip's editable-install (-e), pip converts dashes to underscores
     package_name_dashes_to_underscores=$(echo "$PACKAGE_NAME" | sed -r 's/-/_/g')
-    sed -i "/#egg=$package_name_dashes_to_underscores$/d" ./$TEMPDIR/$DOCKER_DEPS
-    sed -i "/^#/d" ./$TEMPDIR/$DOCKER_DEPS  # remove all commented lines  # see comments in https://github.com/pypa/pip/issues/6199
+    sed -i "/#egg=$package_name_dashes_to_underscores$/d" ./$TEMPDIR/$PIP_FREEZE
+    sed -i "/^#/d" ./$TEMPDIR/$PIP_FREEZE  # remove all commented lines  # see comments in https://github.com/pypa/pip/issues/6199
+
+    # PIP_DEP_TREE
+    sed -i "s/^$PACKAGE_NAME==.*/$PACKAGE_NAME/g" ./$TEMPDIR/$PIP_DEP_TREE
 fi
-cat ./$TEMPDIR/$DOCKER_DEPS
-# - rename & remove temp dir
-mv ./$TEMPDIR/$DOCKER_DEPS $DOCKER_DEPS
+
+
+# combine & cleanup
+DOCKER_DEPS="dependencies-from-$(basename $1).log"
+echo "#" >> $DOCKER_DEPS
+echo "# This file was autogenerated within the container built from $1" >> $DOCKER_DEPS
+echo "#" >> $DOCKER_DEPS
+echo "########################################################################" >> $DOCKER_DEPS
+echo "#  pip freeze" >> $DOCKER_DEPS
+echo "########################################################################" >> $DOCKER_DEPS
+cat ./$TEMPDIR/$PIP_FREEZE >> $DOCKER_DEPS
+echo "########################################################################" >> $DOCKER_DEPS
+echo "#  pipdeptree" >> $DOCKER_DEPS
+echo "########################################################################" >> $DOCKER_DEPS
+cat ./$TEMPDIR/$PIP_DEP_TREE >> $DOCKER_DEPS
+cat $DOCKER_DEPS
 rm -r ./$TEMPDIR/