diff --git a/all_requirements.py b/all_requirements.py
new file mode 100644
index 00000000000..0178f769dd0
--- /dev/null
+++ b/all_requirements.py
@@ -0,0 +1,95 @@
+import ast
+import csv
+
+from packaging.version import parse as parse_version
+
+
+def tree_pkgs(node):
+    result = {pkg: set(versions) for pkg, versions in node.pkgs.items()}
+    for child_venv in node.venvs:
+        child_pkgs = tree_pkgs(child_venv)
+        for pkg_name, versions in child_pkgs.items():
+            if pkg_name in result:
+                result[pkg_name] = result[pkg_name].union(versions)
+            else:
+                result[pkg_name] = versions
+    return result
+
+
+def get_venv_root_ast_node(syntax_tree):
+    for node in reversed(syntax_tree.body):
+        if hasattr(node, "targets"):
+            if node.targets[0].id == "venv":
+                return node.value
+
+
+def get_children(venv_ast_node):
+    for keyword in getattr(venv_ast_node, "keywords", []):
+        if keyword.arg == "venvs":
+            return keyword.value.elts
+    return []
+
+
+def _parse_requirements_from_node(venv_ast_node):
+    pkgs_node = None
+    for keyword in getattr(venv_ast_node, "keywords", []):
+        if keyword.arg == "pkgs":
+            pkgs_node = keyword
+
+    if not pkgs_node:
+        return dict()
+
+    requirements = dict()
+    for key, value in zip(pkgs_node.value.keys, pkgs_node.value.values):
+        versions = set()
+        if isinstance(value, ast.Constant):
+            versions = set([value.value])
+        elif isinstance(value, ast.List):
+            versions = [getattr(item, "value", "") for item in value.elts]
+        requirements[key.value] = set(
+            [part.strip("~<>==") for v in [v.split(",") for v in versions if v] for part in v if "!=" not in part]
+        )
+    return requirements
+
+
+def _requirements_at_node(venv_ast_node):
+    result = _parse_requirements_from_node(venv_ast_node)
+    for child in get_children(venv_ast_node):
+        child_pkgs = _requirements_at_node(child)
+        for pkg_name, versions in child_pkgs.items():
+            if pkg_name in result:
+                result[pkg_name] = result[pkg_name].union(versions)
+            else:
+                result[pkg_name] = versions
+    return result
+
+
+def parse_riotfile_ast(riotfile_ast):
+    root_venv_node = get_venv_root_ast_node(riotfile_ast)
+    requirements = _requirements_at_node(root_venv_node)
+    return requirements
+
+
+def get_riotfile_requirements():
+    with open("riotfile.py", "r") as f:
+        riotfile_content = f.read()
+    return parse_riotfile_ast(ast.parse(riotfile_content))
+
+
+def main():
+    """Discover the minimum version of every package referenced in the riotfile
+
+    Writes to stdout and min_versions.csv
+    """
+    all_pkgs = get_riotfile_requirements()
+    with open("min_versions.csv", "w") as csvfile:
+        csv_writer = csv.writer(csvfile, delimiter=",")
+        for pkg, versions in all_pkgs.items():
+            min_version = "0"
+            if versions:
+                min_version = min((parse_version(v) for v in versions))
+            print("%s\n\tTested versions: %s\n\tMinimum: %s" % (pkg, versions, min_version))
+            csv_writer.writerow([pkg, min_version])
+
+
+main()