diff --git a/plugins/python-build/share/python-build/3.7.0b5 b/plugins/python-build/share/python-build/3.6.6rc1
similarity index 50%
rename from plugins/python-build/share/python-build/3.7.0b5
rename to plugins/python-build/share/python-build/3.6.6rc1
index 0be97796..de6396c9 100644
--- a/plugins/python-build/share/python-build/3.7.0b5
+++ b/plugins/python-build/share/python-build/3.6.6rc1
@@ -2,7 +2,7 @@
 install_package "openssl-1.0.2k" "https://www.openssl.org/source/openssl-1.0.2k.tar.gz#6b3977c61f2aedf0f96367dcfb5c6e578cf37e7b8d913b4ecb6643c3cb88d8c0" mac_openssl --if has_broken_mac_openssl
 install_package "readline-6.3" "https://ftpmirror.gnu.org/readline/readline-6.3.tar.gz#56ba6071b9462f980c5a72ab0023893b65ba6debb4eeb475d7a563dc65cafd43" standard --if has_broken_mac_readline
 if has_tar_xz_support; then
-  install_package "Python-3.7.0b5" "https://www.python.org/ftp/python/3.7.0/Python-3.7.0b5.tar.xz#00e4d85ebd5392f75e979b4cf860b1711642d62fbdd38e0874355b0245185313" ldflags_dirs standard verify_py37 ensurepip
+  install_package "Python-3.6.6rc1" "https://www.python.org/ftp/python/3.6.6/Python-3.6.6rc1.tar.xz#dcbf5a4b944c4d5ef367c0c413f28081e053d920e759d0e4b64418ea7280050c" ldflags_dirs standard verify_py37 ensurepip
 else
-  install_package "Python-3.7.0b5" "https://www.python.org/ftp/python/3.7.0/Python-3.7.0b5.tgz#b8ac2dcfc225a46c461679c854be71e8cf70a092b00270e6cbe262fc9f5785d3" ldflags_dirs standard verify_py37 ensurepip
+  install_package "Python-3.6.6rc1" "https://www.python.org/ftp/python/3.6.6/Python-3.6.6rc1.tgz#93965e1781cf685a7a440b3fc9d4f4d36652a904249f38ad6bee2d5abea7d4a8" ldflags_dirs standard verify_py37 ensurepip
 fi
diff --git a/plugins/python-build/share/python-build/3.7.0rc1 b/plugins/python-build/share/python-build/3.7.0rc1
new file mode 100644
index 00000000..b3d7ca27
--- /dev/null
+++ b/plugins/python-build/share/python-build/3.7.0rc1
@@ -0,0 +1,8 @@
+#require_gcc
+install_package "openssl-1.0.2k" "https://www.openssl.org/source/openssl-1.0.2k.tar.gz#6b3977c61f2aedf0f96367dcfb5c6e578cf37e7b8d913b4ecb6643c3cb88d8c0" mac_openssl --if has_broken_mac_openssl
+install_package "readline-6.3" "https://ftpmirror.gnu.org/readline/readline-6.3.tar.gz#56ba6071b9462f980c5a72ab0023893b65ba6debb4eeb475d7a563dc65cafd43" standard --if has_broken_mac_readline
+if has_tar_xz_support; then
+  install_package "Python-3.7.0rc1" "https://www.python.org/ftp/python/3.7.0/Python-3.7.0rc1.tar.xz#c9cfb9b60c23e3ed20e942fdeee299b27c0b4abd7def9b4a3a78d37e6c0c0bb7" ldflags_dirs standard verify_py37 ensurepip
+else
+  install_package "Python-3.7.0rc1" "https://www.python.org/ftp/python/3.7.0/Python-3.7.0rc1.tgz#917f3c8e898056ec790eca1a816a64946950a4bd304ece8b1024e4f6bacddf95" ldflags_dirs standard verify_py37 ensurepip
+fi