diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index 7fff98a7..cad61cea 100755
--- a/plugins/python-build/bin/python-build
+++ b/plugins/python-build/bin/python-build
@@ -299,13 +299,39 @@ fetch_svn() {
 fetch_jar() {
   local package_name="$1"
   local package_url="$2"
+  local mirror_url
+  local checksum
 
-  echo "Downloading ${package_url}..." >&2
-  { fetch_url "$package_url" > "${package_name}.jar"
-    $JAVA -jar ${package_name}.jar -s -d ${package_name}
+  if [ "$package_url" != "${package_url/\#}" ]; then
+    checksum="${package_url#*#}"
+    package_url="${package_url%%#*}"
+
+    if [ -n "$PYTHON_BUILD_MIRROR_URL" ]; then
+      mirror_url="${PYTHON_BUILD_MIRROR_URL}/$checksum"
+    fi
+  fi
+
+  local package_filename="${package_name}.jar"
+  symlink_jar_from_cache "$package_filename" "checksum" || {
+    echo "Downloading ${package_filename}..." >&2
+    { http head "$mirror_url" &&
+      download_jar "$mirror_url" "$package_filename" "$checksum"
+    } ||
+    download_jar "$package_url" "$package_filename" "$checksum"
+  }
+  { $JAVA -jar ${package_name}.jar -s -d ${package_name}
+    rm -f "$package_filename"
   } >&4 2>&1
 }
 
+symlink_jar_from_cache() {
+  symlink_tarball_from_cache "$@"
+}
+
+download_jar() {
+  download_tarball "$@"
+}
+
 build_package() {
   local package_name="$1"
   shift
diff --git a/plugins/python-build/share/python-build/2.6.6 b/plugins/python-build/share/python-build/2.6.6
index 20ecf971..d0012e5d 100644
--- a/plugins/python-build/share/python-build/2.6.6
+++ b/plugins/python-build/share/python-build/2.6.6
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac
diff --git a/plugins/python-build/share/python-build/2.6.7 b/plugins/python-build/share/python-build/2.6.7
index 271d9d08..76ed458c 100644
--- a/plugins/python-build/share/python-build/2.6.7
+++ b/plugins/python-build/share/python-build/2.6.7
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac
diff --git a/plugins/python-build/share/python-build/2.6.8 b/plugins/python-build/share/python-build/2.6.8
index d811f1bb..45df6035 100644
--- a/plugins/python-build/share/python-build/2.6.8
+++ b/plugins/python-build/share/python-build/2.6.8
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac
diff --git a/plugins/python-build/share/python-build/2.7 b/plugins/python-build/share/python-build/2.7
index 391aaa64..80fa2c63 100644
--- a/plugins/python-build/share/python-build/2.7
+++ b/plugins/python-build/share/python-build/2.7
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac
diff --git a/plugins/python-build/share/python-build/2.7.1 b/plugins/python-build/share/python-build/2.7.1
index ad0a21e0..f50615f7 100644
--- a/plugins/python-build/share/python-build/2.7.1
+++ b/plugins/python-build/share/python-build/2.7.1
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac
diff --git a/plugins/python-build/share/python-build/3.0.1 b/plugins/python-build/share/python-build/3.0.1
index c93b6794..4402bc2a 100644
--- a/plugins/python-build/share/python-build/3.0.1
+++ b/plugins/python-build/share/python-build/3.0.1
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/python30/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/python30/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac
diff --git a/plugins/python-build/share/python-build/3.1.3 b/plugins/python-build/share/python-build/3.1.3
index a4030771..4e330482 100644
--- a/plugins/python-build/share/python-build/3.1.3
+++ b/plugins/python-build/share/python-build/3.1.3
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/common/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac
diff --git a/plugins/python-build/share/python-build/3.2 b/plugins/python-build/share/python-build/3.2
index fe579f43..b3ef4f51 100644
--- a/plugins/python-build/share/python-build/3.2
+++ b/plugins/python-build/share/python-build/3.2
@@ -2,7 +2,7 @@ before_install_package() {
   local package_name="$1"
   case "$package_name" in
   Python*)
-    fetch_url "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/python32/patch-setup.py.diff" > setup.patch
+    http get "https://raw.github.com/saghul/pythonz/346450868902fed0fe654c472b7b58e2e31fde70/pythonz/patches/all/python32/patch-setup.py.diff" > setup.patch
     patch -p0 < setup.patch
   ;;
   esac