diff --git a/.gitignore b/.gitignore
index 6fe13d0..26f7f0a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 swh-*/
 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
index 806ffec..0000000
--- 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-swh-packages b/bin/pip-swh-packages
new file mode 100755
index 0000000..6a52b3b
--- /dev/null
+++ b/bin/pip-swh-packages
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+./bin/py-depgraph |
+    grep -- '->' |
+    sed -e 's/[";]//g' -e 's/->//g' |
+    tsort |
+    tac |
+    grep '^swh\.' |
+    sed 's:\.:-:g' |
+    sed 's:^:-e :'
diff --git a/bin/py-depgraph b/bin/py-depgraph
index 5e39faa..7429e4a 100755
--- a/bin/py-depgraph
+++ b/bin/py-depgraph
@@ -1,59 +1,62 @@
 #!/bin/bash
 
 # generate dependency graph (in DOT(1) format) for all known python modules
 #
 # include by default both internal and external dependencies, but can asked to
 # include either or none of them (see --help)
 
 internal_modules=1
 external_modules=1
 while [ -n "$1" ] ; do
     if [ "$1" = "--no-internal" ] ; then
         internal_modules=0
     elif [ "$1" = "--no-external" ] ; then
         external_modules=0
     elif [ "$1" = "--help" -o "$1" = "-h" ] ; then
         echo "Usage: bin/py-depgraph [--no-internal] [--no-external] > FILE.dot"
         exit 1
     fi
     shift 1
 done
 
 pyrepos=$(bin/ls-py-modules)  # available python repositories (with '-')
 
 declare -A pymods  # available python modules (with '.')
 for repo in $pyrepos ; do
     pymod=${repo//-/.}
     pymods[$pymod]=1
 done
 
 echo "digraph swh_py_deps {"
 
 for pymod in ${!pymods[@]} ; do
     echo -e "\t\"$pymod\" ;"
 done
 
 getdeps() {
-    grep -E -v '(^#|^[[:space:]]*$)' "$1" | cut -f 1 -d ' ' | tr 'A-Z' 'a-z'
+    grep -E -v '(^#|^[[:space:]]*$)' "$1" |
+        cut -f 1 -d ' ' |
+        tr 'A-Z' 'a-z' |
+        sed -E 's/\[\w+\]//'
 }
 
 for repo in $pyrepos ; do
     pymod=${repo//-/.}
     reqs_int="${repo}/requirements-swh.txt"
     reqs_ext="${repo}/requirements.txt"
 
     if [ "$internal_modules" -eq 1 -a -f "$reqs_int" ]; then
         for dep in $( getdeps "$reqs_int" ) ; do
             echo -e "\t\"${pymod}\" -> \"${dep}\" ;"
         done
     fi
 
     if [ "$external_modules" -eq 1 -a -f "$reqs_ext" ]; then
         for dep in $( getdeps "$reqs_ext" ) ; do
             echo -e "\t\"${dep}\" [style=dashed] ;"
             echo -e "\t\"${pymod}\" -> \"${dep}\" ;"
         done
     fi
 done | sort -u
 
 echo "}"