diff --git a/plugins/python-build/bin/pyenv-install b/plugins/python-build/bin/pyenv-install
index 1c30ac8c..677f5c8b 100755
--- a/plugins/python-build/bin/pyenv-install
+++ b/plugins/python-build/bin/pyenv-install
@@ -45,7 +45,7 @@ usage() {
 
 definitions() {
   local query="$1"
-  python-build --definitions | grep -F "$query" || true
+  python-build --definitions | $(type -p ggrep grep | head -1) -F "$query" || true
 }
 
 indent() {
diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index 13bc3264..56834874 100755
--- a/plugins/python-build/bin/python-build
+++ b/plugins/python-build/bin/python-build
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-PYTHON_BUILD_VERSION="20140408"
+PYTHON_BUILD_VERSION="20140420"
 
 set -E
 exec 3<&2 # preserve original stderr at fd 3
@@ -284,7 +284,8 @@ fetch_tarball() {
   fi
 
   if ! reuse_existing_tarball "$package_filename" "$checksum"; then
-    echo "Downloading ${package_filename}..." >&2
+    local tarball_filename=$(basename $package_url)
+    echo "Downloading ${tarball_filename}..." >&2
     http head "$mirror_url" &&
     download_tarball "$mirror_url" "$package_filename" "$checksum" ||
     download_tarball "$package_url" "$package_filename" "$checksum"
diff --git a/plugins/python-build/test/test_helper.bash b/plugins/python-build/test/test_helper.bash
index 6bbc31ab..f4adba9c 100644
--- a/plugins/python-build/test/test_helper.bash
+++ b/plugins/python-build/test/test_helper.bash
@@ -115,7 +115,7 @@ assert_output() {
 
 assert_output_contains() {
   local expected="$1"
-  echo "$output" | grep -F "$expected" >/dev/null || {
+  echo "$output" | $(type -p ggrep grep | head -1) -F "$expected" >/dev/null || {
     { echo "expected output to contain $expected"
       echo "actual: $output"
     } | flunk