diff --git a/bin/install b/bin/install
--- a/bin/install
+++ b/bin/install
@@ -1,3 +1,14 @@
 #!/usr/bin/env bash
 
-pip install $(./bin/pip-swh-packages --with-testing) "$@"
+# Usage: bin/install [PIP_INSTALL_OPTION..]
+
+PREREQUISITES="pre-commit flake8 pifpaf tox wheel mypy"
+
+pip install --upgrade pip "$@"
+
+pip install $PREREQUISITES "$@"
+
+bin/pip-swh-packages --with-testing | \
+    while read pkg_spec ; do
+        pip install $pkg_spec
+    done
diff --git a/bin/pip-swh-packages b/bin/pip-swh-packages
--- a/bin/pip-swh-packages
+++ b/bin/pip-swh-packages
@@ -9,11 +9,11 @@
 
 ./bin/py-depgraph |
     grep -- '->' |
-    sed -e 's/[";]//g' -e 's/->//g' |
+    sed -e 's/[";]//g' -e 's/->//g' -e 's/\[.*$//g' |
     tsort |
     tac |
     grep '^swh\.' |
     sed 's:\.:-:g' |
     sed 's:^:-e :' |
     sed "s/$/$suffix/" |
-    sed -e 's/\]\[/,/g'
+    sed 's/\]\[/,/g'