diff --git a/plugins/python-build/bin/pyenv-install b/plugins/python-build/bin/pyenv-install
index 718a02f4..9dbe9094 100755
--- a/plugins/python-build/bin/pyenv-install
+++ b/plugins/python-build/bin/pyenv-install
@@ -1,17 +1,21 @@
 #!/usr/bin/env bash
 #
-# Summary: Install a Python version using the python-build plugin
+# Summary: Install a Python version using python-build
 #
-# Usage: pyenv install [-f|--force] [-g|--debug] [-k|--keep] [-v|--verbose] <version>
-#        pyenv install [-f|--force] [-g|--debug] [-k|--keep] [-v|--verbose] <definition-file>
+# Usage: pyenv install [-f] [-kvp] <version>
+#        pyenv install [-f] [-kvp] <definition-file>
 #        pyenv install -l|--list
 #
 #   -l/--list        List all available versions
 #   -f/--force       Install even if the version appears to be installed already
+#
+#   python-build options:
+#
 #   -k/--keep        Keep source tree in $PYENV_BUILD_ROOT after installation
 #                    (defaults to $PYENV_ROOT/sources)
-#   -g/--debug       Build a debug version
 #   -v/--verbose     Verbose mode: print compilation status to stdout
+#   -p/--patch       Apply a patch from stdin before building
+#   -g/--debug       Build a debug version
 #
 # For detailed information on installing Python versions with
 # python-build, including a list of environment variables for adjusting
@@ -50,6 +54,7 @@ indent() {
 unset FORCE
 unset KEEP
 unset VERBOSE
+unset HAS_PATCH
 unset DEBUG
 
 parse_options "$@"
@@ -72,6 +77,9 @@ for option in "${OPTIONS[@]}"; do
   "v" | "verbose" )
     VERBOSE="-v"
     ;;
+  "p" | "patch" )
+    HAS_PATCH="-p"
+    ;;
   "g" | "debug" )
     DEBUG="-g"
     ;;
@@ -167,7 +175,7 @@ trap cleanup SIGINT
 
 # Invoke `python-build` and record the exit status in $STATUS.
 STATUS=0
-python-build $KEEP $VERBOSE $DEBUG "$DEFINITION" "$PREFIX" || STATUS="$?"
+python-build $KEEP $VERBOSE $HAS_PATCH $DEBUG "$DEFINITION" "$PREFIX" || STATUS="$?"
 
 # Display a more helpful message if the definition wasn't found.
 if [ "$STATUS" == "2" ]; then
diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index 7a8783aa..bda04de2 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="20131211"
+PYTHON_BUILD_VERSION="20131225.1"
 
 set -E
 exec 3<&2 # preserve original stderr at fd 3
@@ -307,16 +307,14 @@ fetch_tarball() {
   local tar_args="xzvf"
   local package_filename="${package_name}.tar.gz"
 
-  local package_suffix extract_option
-  case "${package_url}" in
-  *".tgz" )
-    package_filename="${package_name}.tgz"
-  ;;
-  *".tar.bz2" )
-    package_filename="${package_name}.tar.bz2"
+  if [ "$package_url" != "${package_url%tgz}" ]; then
+    package_filename="${package_filename%tar.gz}tgz"
+  fi
+
+  if [ "$package_url" != "${package_url%bz2}" ]; then
+    package_filename="${package_filename%.gz}.bz2"
     tar_args="${tar_args/z/j}"
-  ;;
-  esac
+  fi
 
   if ! symlink_tarball_from_cache "$package_filename" "$checksum"; then
     echo "Downloading ${package_filename}..." >&2
@@ -527,6 +525,8 @@ build_package() {
 
   echo "Installing ${package_name}..." >&2
 
+  [ -n "$HAS_PATCH" ] && apply_python_patch "$package_name"
+
   for command in $commands; do
     "build_package_${command}" "$package_name"
   done
@@ -677,6 +677,7 @@ build_package_jruby() {
   ln -fs jruby ruby
   install_jruby_launcher
   remove_windows_files
+  fix_jruby_shebangs
 }
 
 install_jruby_launcher() {
@@ -685,6 +686,15 @@ install_jruby_launcher() {
   } >&4 2>&1
 }
 
+fix_jruby_shebangs() {
+  for file in "${PREFIX_PATH}/bin"/*; do
+    if [ "$(head -c 20 "$file")" = "#!/usr/bin/env jruby" ]; then
+      sed -i.bak -E "1s:.+:#\!${PREFIX_PATH}/bin/jruby:" "$file"
+      rm "$file".bak
+    fi
+  done
+}
+
 remove_windows_files() {
   cd "$PREFIX_PATH"
   rm -f bin/*.exe bin/*.dll bin/*.bat bin/jruby.sh
@@ -1078,6 +1088,14 @@ isolated_gem_install() {
   gem install "$@"
 }
 
+apply_python_patch() {
+  case "$1" in
+  Python-* | jython-* | pypy-* )
+    patch -p0 -i "${2:--}"
+    ;;
+  esac
+}
+
 has_broken_mac_llvm_gcc() {
   [ "$(uname -s)" = "Darwin" ] &&
   [[ "$(gcc --version 2>/dev/null || true)" == *"llvm-gcc-4.2"* ]]
@@ -1208,7 +1226,7 @@ version() {
 
 usage() {
   { version
-    echo "usage: python-build [-g|--debug] [-k|--keep] [-v|--verbose] definition prefix"
+    echo "usage: python-build [-k|--keep] [-v|--verbose] [-p|--patch] [-g|--debug] definition prefix"
     echo "       python-build --definitions"
   } >&2
 
@@ -1228,8 +1246,9 @@ list_definitions() {
 
 unset VERBOSE
 unset KEEP_BUILD_PATH
-PYTHON_BUILD_ROOT="$(abs_dirname "$0")/.."
+unset HAS_PATCH
 unset DEBUG
+PYTHON_BUILD_ROOT="$(abs_dirname "$0")/.."
 
 parse_options "$@"
 
@@ -1239,8 +1258,9 @@ for option in "${OPTIONS[@]}"; do
     usage without_exiting
     { echo
       echo "  -k/--keep        Do not remove source tree after installation"
-      echo "  -g/--debug       Build a debug version"
       echo "  -v/--verbose     Verbose mode: print compilation status to stdout"
+      echo "  -p/--patch       Apply a patch from stdin before building"
+      echo "  -g/--debug       Build a debug version"
       echo "  --definitions    List all built-in definitions"
       echo
     } >&2
@@ -1256,6 +1276,9 @@ for option in "${OPTIONS[@]}"; do
   "v" | "verbose" )
     VERBOSE=true
     ;;
+  "p" | "patch" )
+    HAS_PATCH=true
+    ;;
   "g" | "debug" )
     DEBUG=true
     ;;