diff --git a/.gitignore b/.gitignore
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,6 @@
 packages/*
 snippets/
 !packages/README
-!packages/keys/
\ No newline at end of file
+!packages/keys/
+
+.venv
diff --git a/bin/pip-install-deps b/bin/pip-install-deps
deleted file mode 100755
--- a/bin/pip-install-deps
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/bash
-
-LS_DEPS="bin/pip-ls-deps"
-if ! [ -x "$LS_DEPS" ] ; then
-    echo "pip-install-deps should be run from the root of swh-environment. Bye."
-    exit 2
-fi
-
-if [ "$1" = '-h' -o "$1" = '--help' ] ; then
-    echo "Usage: bin/pip-install-deps [PIP3_INSTALL_OPTION]..."
-    echo
-    echo "Tip: you can use bin/pip-ls-deps to list the dependencies that will be installed."
-    exit 2
-fi
-
-set -x
-
-requirements=$(mktemp tmp.swh-requirements.txt.XXXXXXXXXX)
-trap "rm -f ${requirements}" EXIT
-"$LS_DEPS" > "$requirements"
-
-pip3 install --requirement "$requirements" "$@"
diff --git a/bin/pip-ls-deps b/bin/pip-ls-deps
deleted file mode 100755
--- a/bin/pip-ls-deps
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/bin/bash
-
-LS_MODS="bin/ls-py-modules"
-if ! [ -x "$LS_MODS" ] ; then
-    echo "pip-ls-deps should be run from the root of swh-environment. Bye."
-    exit 2
-fi
-
-for pymod in $(${LS_MODS}) ; do
-    reqs="${pymod}/requirements.txt"
-    if [ -f "$reqs" ] ; then
-        cat "$reqs"
-    fi
-done \
-| egrep -v '^#|^[[:blank:]]*$' \
-| tr '[:upper:]_' '[:lower:]-' \
-| sort -ru \
-| awk '!seen[$1]++' \
-| tac
-
-# WARNING: CRUDE HACK in the pipeline above. 'pip3 install' will fail if the
-# same package name appears multiple times, e.g., as both "django" and "django
-# >= 1.10.7" rather than trying to determine (when possible) a comprehensive
-# constraint.  So we deduplicate here, by first sorting alphabetically which
-# will (generally...) put higher dependency constraints last and then
-# deduplicate using the sole package name as key. In the example above this
-# should only keep "django >= 1.10.7" and get rid of "django".
diff --git a/bin/pip-swh-packages b/bin/pip-swh-packages
new file mode 100755
--- /dev/null
+++ b/bin/pip-swh-packages
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+./bin/py-depgraph |
+    grep -- '->' |
+    sed -e 's/[";]//g' -e 's/->//g' |
+    tsort |
+    tac |
+    grep '^swh\.' |
+    grep -v '\[' |
+    sed 's:\.:-:g' |
+    sed 's:^:-e :'