diff --git a/pex/BUILD b/pex/BUILD
index fff2cd86..dce57010 100644
--- a/pex/BUILD
+++ b/pex/BUILD
@@ -22,7 +22,8 @@ genrule(
         # Workaround really long shebang lines breaking on linux:
         # Use a /tmp path, but keep the actual venv inside the bazel outdir.
         # Avoids having to worry about cleanup, even if sandboxing is off.
-        TMPF=$$(mktemp)
+        # `mktemp -t tmp` is used for older OS X versions.
+        TMPF=$$(mktemp 2>/dev/null || mktemp -t tmp)
         ln -sf "$$OUTDIR" "$$TMPF"
         VENV="$${TMPF}/venv"
 
diff --git a/pex/pex_rules.bzl b/pex/pex_rules.bzl
index 8e15ea9a..947fb373 100644
--- a/pex/pex_rules.bzl
+++ b/pex/pex_rules.bzl
@@ -48,6 +48,21 @@ so that Bazel can find your `prelude_bazel` file.
 
 pex_file_types = FileType([".py"])
 egg_file_types = FileType([".egg", ".whl"])
+req_file_types = FileType([".txt"])
+
+# Repos file types according to: https://www.python.org/dev/peps/pep-0527/
+repo_file_types = FileType([
+    ".egg",
+    ".whl",
+    ".tar.gz",
+    ".zip",
+    ".tar",
+    ".tar.bz2",
+    ".tar.xz",
+    ".tar.Z",
+    ".tgz",
+    ".tbz"
+])
 
 # As much as I think this test file naming convention is a good thing, it's
 # probably a bad idea to impose it as a policy to all OSS users of these rules,
@@ -82,6 +97,16 @@ def _collect_transitive_reqs(ctx):
   return transitive_reqs
 
 
+def _collect_repos(ctx):
+  repos = {}
+  for dep in ctx.attr.deps:
+    if hasattr(dep.py, "repos"):
+      repos += dep.py.repos
+  for file in repo_file_types.filter(ctx.files.repos):
+    repos.update({file.dirname : True})
+  return repos.keys()
+
+
 def _collect_transitive(ctx):
   return struct(
       # These rules don't use transitive_sources internally; it's just here for
@@ -159,6 +184,7 @@ def _pex_binary_impl(ctx):
       ctx.configuration.bin_dir, ctx.outputs.executable, '.pex')
 
   py = _collect_transitive(ctx)
+  repos = _collect_repos(ctx)
 
   for dep in ctx.attr.deps:
     transitive_files += dep.default_runfiles.files
@@ -184,6 +210,14 @@ def _pex_binary_impl(ctx):
   arguments += [] if ctx.attr.pex_use_wheels else ["--no-use-wheel"]
   if ctx.attr.interpreter:
     arguments += ["--python", ctx.attr.interpreter]
+  if ctx.attr.no_index:
+    arguments += ["--no-index"]
+  if ctx.attr.disable_cache:
+    arguments += ["--disable-cache"]
+  for req_file in ctx.files.req_files:
+    arguments += ["--requirement", req_file.path]
+  for repo in repos:
+    arguments += ["--repo", repo]
   for egg in py.transitive_eggs:
     arguments += ["--find-links", egg.dirname]
   arguments += [
@@ -286,6 +320,12 @@ pex_attrs = {
     "eggs": attr.label_list(flags = ["DIRECT_COMPILE_TIME_INPUT"],
                             allow_files = egg_file_types),
     "reqs": attr.string_list(),
+    "req_files": attr.label_list(flags = ["DIRECT_COMPILE_TIME_INPUT"],
+                            allow_files = req_file_types),
+    "no_index": attr.bool(default=False),
+    "disable_cache": attr.bool(default=False),
+    "repos": attr.label_list(flags = ["DIRECT_COMPILE_TIME_INPUT"],
+                            allow_files = repo_file_types),
     "data": attr.label_list(allow_files = True,
                             cfg = "data"),
 
@@ -350,6 +390,19 @@ Args:
 
     It is recommended that you use `eggs` instead where possible.
 
+  req_files: Add requirements from the given requirements files. Must be provided as labels.
+
+    This feature will reduce build determinism!  It tells pex to resolve all
+    the transitive python dependencies and fetch them from pypi.
+
+    It is recommended that you use `eggs` or specify `no_index` instead where possible.
+
+  no_index: If True, don't use pypi to resolve dependencies for `reqs` and `req_files`; Default: False
+
+  disable_cache: Disable caching in the pex tool entirely. Default: False
+
+  repos: Additional repository labels (filegroups of wheel/egg files) to look for requirements.
+
   data: Files to include as resources in the final pex binary.
 
     Putting other rules here will cause the *outputs* of those rules to be