diff --git a/build-support/bin/ci.sh b/build-support/bin/ci.sh
index fa12ca919a8..73dacea9906 100755
--- a/build-support/bin/ci.sh
+++ b/build-support/bin/ci.sh
@@ -94,7 +94,7 @@ fi
 if [[ "${skip_pre_commit_checks:-false}" == "false" ]]; then
   banner "Running pre-commit checks"
 
-  ./build-support/bin/pre-commit.sh || exit 1
+  FULL_CHECK=1 ./build-support/bin/pre-commit.sh || exit 1
 fi
 
 # TODO(John sirois): Re-plumb build such that it grabs constraints from the built python_binary
diff --git a/build-support/bin/pre-commit.sh b/build-support/bin/pre-commit.sh
index a8a7e7b83fe..d962375e1f4 100755
--- a/build-support/bin/pre-commit.sh
+++ b/build-support/bin/pre-commit.sh
@@ -4,8 +4,13 @@
 
 source build-support/common.sh
 
+if [[ -z $FULL_CHECK ]]
+then
+    export GIT_HOOK=1
+fi
+
 echo "Checking packages" && ./build-support/bin/check_packages.sh || exit 1
-echo "Checking imports" && GIT_HOOK=1 ./build-support/bin/isort.sh || \
+echo "Checking imports" && ./build-support/bin/isort.sh || \
   die "To fix import sort order, run \`build-support/bin/isort.sh -f\`"
 echo "Checking headers" && ./build-support/bin/check_header.sh || exit 1
 echo "Success"
diff --git a/src/python/pants/backend/core/wrapped_globs.py b/src/python/pants/backend/core/wrapped_globs.py
index 33d48b764da..5aef3822ec6 100644
--- a/src/python/pants/backend/core/wrapped_globs.py
+++ b/src/python/pants/backend/core/wrapped_globs.py
@@ -100,7 +100,9 @@ def files_calculator():
       return result
 
     buildroot = get_buildroot()
-    rel_root = os.path.relpath(root, buildroot) if root != buildroot else ''
+    rel_root = os.path.relpath(root, buildroot)
+    if rel_root == '.':
+      rel_root = ''
     filespec = self.to_filespec(args, root=rel_root, excludes=excludes)
     return FilesetWithSpec(rel_root, filespec, files_calculator)
 
diff --git a/tests/python/pants_test/tasks/test_what_changed.py b/tests/python/pants_test/tasks/test_what_changed.py
index 3e0e5e9aa5f..ce6dfd0700d 100644
--- a/tests/python/pants_test/tasks/test_what_changed.py
+++ b/tests/python/pants_test/tasks/test_what_changed.py
@@ -13,7 +13,7 @@
 from pants.backend.core.from_target import FromTarget
 from pants.backend.core.targets.resources import Resources
 from pants.backend.core.tasks.what_changed import WhatChanged
-from pants.backend.core.wrapped_globs import RGlobs, Globs
+from pants.backend.core.wrapped_globs import Globs, RGlobs
 from pants.backend.jvm.targets.jar_dependency import JarDependency
 from pants.backend.jvm.targets.jar_library import JarLibrary
 from pants.backend.jvm.targets.java_library import JavaLibrary