1diff --git a/python/pip_install/pip_repository.bzl b/python/pip_install/pip_repository.bzl
2index c3007e1..f8a9234 100644
3--- a/python/pip_install/pip_repository.bzl
4+++ b/python/pip_install/pip_repository.bzl
5@@ -39,7 +39,8 @@ def _resolve_python_interpreter(rctx):
6         if "/" not in python_interpreter:
7             python_interpreter = rctx.which(python_interpreter)
8         if not python_interpreter:
9-            fail("python interpreter not found")
10+            print("WARNING: python interpreter not found. Python targets will not be functional")
11+            return ""
12     return python_interpreter
13
14 def _parse_optional_attrs(rctx, args):
15@@ -93,13 +94,49 @@ def _parse_optional_attrs(rctx, args):
16
17     return args
18
19+def _generate_stub_requirements_bzl(rctx):
20+    contents = """\
21+def requirement(name):
22+    return "@{repo}//:empty"
23+""".format(repo=rctx.attr.name)
24+    rctx.file("requirements.bzl", contents)
25+
26 _BUILD_FILE_CONTENTS = """\
27 package(default_visibility = ["//visibility:public"])
28
29 # Ensure the `requirements.bzl` source can be accessed by stardoc, since users load() from it
30 exports_files(["requirements.bzl"])
31+
32+py_library(
33+    name = "empty",
34+    srcs = [],
35+)
36 """
37
38+def _python_version_info(rctx, python_interpreter, info_index):
39+    cmd = [
40+        python_interpreter,
41+        "-c",
42+        "from __future__ import print_function; import sys; print(sys.version_info[{}])".format(info_index)
43+    ]
44+    result = rctx.execute(cmd)
45+    if result.stderr or not result.stdout:
46+      print("WARNING: Failed to get version info from {}".format(python_interpreter))
47+      return None
48+    return int(result.stdout.strip())
49+
50+def _python_version_supported(rctx, python_interpreter):
51+    major_version = _python_version_info(rctx, python_interpreter, 0)
52+    minor_version = _python_version_info(rctx, python_interpreter, 1)
53+    if major_version == None or minor_version == None:
54+        print("WARNING: Failed to get Python version of {}".format(python_interpreter))
55+        return False
56+    if (major_version != 3 or minor_version < 6):
57+        print("WARNING: {} is of version {}.{}. This version is unsupported.".format(python_interpreter, major_version, minor_version))
58+        return False
59+    return True
60+
61+
62 def _pip_repository_impl(rctx):
63     python_interpreter = _resolve_python_interpreter(rctx)
64
65@@ -109,6 +146,11 @@ def _pip_repository_impl(rctx):
66     # We need a BUILD file to load the generated requirements.bzl
67     rctx.file("BUILD.bazel", _BUILD_FILE_CONTENTS)
68
69+    # Check if python interpreter has minimum required version.
70+    if not python_interpreter or not _python_version_supported(rctx, python_interpreter):
71+      _generate_stub_requirements_bzl(rctx)
72+      return
73+
74     pypath = _construct_pypath(rctx)
75
76     if rctx.attr.incremental:
77