diff --git a/dockerfiles/Dockerfile.heroku-18 b/dockerfiles/Dockerfile.heroku-18
deleted file mode 100644
index 208358f..0000000
--- a/dockerfiles/Dockerfile.heroku-18
+++ /dev/null
@@ -1,15 +0,0 @@
-FROM heroku/heroku:18-build.v16
-MAINTAINER hone
-
-RUN apt-get update && apt-get install autoconf subversion zip -y
-RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
-ENV PATH="/root/.cargo/bin:${PATH}"
-
-# setup workspace
-RUN rm -rf /tmp/workspace
-RUN mkdir -p /tmp/workspace
-
-# output dir is mounted
-
-ADD build.rb /tmp/build.rb
-CMD ["ruby", "/tmp/build.rb", "/tmp/workspace", "/tmp/output", "/tmp/cache"]
diff --git a/rubies/cedar-14/ruby-2.6.8.sh b/rubies/cedar-14/ruby-2.6.8.sh
deleted file mode 100755
index 4c3ebdb..0000000
--- a/rubies/cedar-14/ruby-2.6.8.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.8  -e STACK=cedar-14 hone/ruby-builder:cedar-14
diff --git a/rubies/cedar-14/ruby-2.7.4.sh b/rubies/cedar-14/ruby-2.7.4.sh
deleted file mode 100755
index 2f6ee5e..0000000
--- a/rubies/cedar-14/ruby-2.7.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.4  -e STACK=cedar-14 hone/ruby-builder:cedar-14
diff --git a/rubies/cedar-14/ruby-2.7.5.sh b/rubies/cedar-14/ruby-2.7.5.sh
deleted file mode 100755
index 701a0d8..0000000
--- a/rubies/cedar-14/ruby-2.7.5.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.5  -e STACK=cedar-14 hone/ruby-builder:cedar-14
diff --git a/rubies/cedar-14/ruby-2.7.6.sh b/rubies/cedar-14/ruby-2.7.6.sh
deleted file mode 100755
index eaee6f3..0000000
--- a/rubies/cedar-14/ruby-2.7.6.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.6  -e STACK=cedar-14 hone/ruby-builder:cedar-14
diff --git a/rubies/heroku-16/ruby-3.0.0.sh b/rubies/heroku-16/ruby-3.0.0.sh
deleted file mode 100755
index e0ca5fc..0000000
--- a/rubies/heroku-16/ruby-3.0.0.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.0  -e STACK=heroku-16 hone/ruby-builder:heroku-16
diff --git a/rubies/heroku-18/ruby-2.3.4.sh b/rubies/heroku-18/ruby-2.3.4.sh
deleted file mode 100755
index eaeef1f..0000000
--- a/rubies/heroku-18/ruby-2.3.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.3.4  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.3.8.sh b/rubies/heroku-18/ruby-2.3.8.sh
deleted file mode 100755
index 4f3677f..0000000
--- a/rubies/heroku-18/ruby-2.3.8.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.3.8  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.0.sh b/rubies/heroku-18/ruby-2.4.0.sh
deleted file mode 100755
index e22299f..0000000
--- a/rubies/heroku-18/ruby-2.4.0.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.0  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.1.sh b/rubies/heroku-18/ruby-2.4.1.sh
deleted file mode 100755
index 40b8440..0000000
--- a/rubies/heroku-18/ruby-2.4.1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.10.sh b/rubies/heroku-18/ruby-2.4.10.sh
deleted file mode 100755
index cc99065..0000000
--- a/rubies/heroku-18/ruby-2.4.10.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.10  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.2.sh b/rubies/heroku-18/ruby-2.4.2.sh
deleted file mode 100755
index a5b0e97..0000000
--- a/rubies/heroku-18/ruby-2.4.2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.3.sh b/rubies/heroku-18/ruby-2.4.3.sh
deleted file mode 100755
index 51c1420..0000000
--- a/rubies/heroku-18/ruby-2.4.3.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.3  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.4.sh b/rubies/heroku-18/ruby-2.4.4.sh
deleted file mode 100755
index d2c4194..0000000
--- a/rubies/heroku-18/ruby-2.4.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.4  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.5.sh b/rubies/heroku-18/ruby-2.4.5.sh
deleted file mode 100755
index 6fc9b01..0000000
--- a/rubies/heroku-18/ruby-2.4.5.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output \
-           -v $CACHE_DIR:/tmp/cache \
-           -e VERSION=2.4.5 \
-           -e STACK=heroku-18 \
-           -e PATCH_URL=https://gist.githubusercontent.com/schneems/fd2bd841515367871e5b332afe9455ea/raw/1de62a84bce330c9ca8336fddb7c143c36a01a1d/ruby-2.4.5-rubygems.patch \
-           hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.6.sh b/rubies/heroku-18/ruby-2.4.6.sh
deleted file mode 100755
index 39bf40c..0000000
--- a/rubies/heroku-18/ruby-2.4.6.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.6  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.7.sh b/rubies/heroku-18/ruby-2.4.7.sh
deleted file mode 100755
index 2eaad24..0000000
--- a/rubies/heroku-18/ruby-2.4.7.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.7  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.8.sh b/rubies/heroku-18/ruby-2.4.8.sh
deleted file mode 100755
index 1572fe1..0000000
--- a/rubies/heroku-18/ruby-2.4.8.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.8  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.4.9.sh b/rubies/heroku-18/ruby-2.4.9.sh
deleted file mode 100755
index f7a0463..0000000
--- a/rubies/heroku-18/ruby-2.4.9.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.4.9  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.0.sh b/rubies/heroku-18/ruby-2.5.0.sh
deleted file mode 100755
index 320b5b1..0000000
--- a/rubies/heroku-18/ruby-2.5.0.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output \
-           -v $CACHE_DIR:/tmp/cache \
-           -e VERSION=2.5.0 \
-           -e STACK=heroku-18 \
-           -e PATCH_URL=https://gist.githubusercontent.com/schneems/8c1c2eae9b255e9e1c18d95bffbb9d9f/raw/31b830252f277646a14ddc73d8e0601a847615f1/rubygems-276-for-ruby25-and-rubygems-cve-and-bundler2 \
-           hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.1.sh b/rubies/heroku-18/ruby-2.5.1.sh
deleted file mode 100755
index 06a5139..0000000
--- a/rubies/heroku-18/ruby-2.5.1.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output \
-           -v $CACHE_DIR:/tmp/cache \
-           -e VERSION=2.5.1 \
-           -e STACK=heroku-18 \
-           -e PATCH_URL=https://gist.githubusercontent.com/schneems/374157aff12e92babb1c6a3c6b744392/raw/c70aceeb7a97b8d8858234104afad0b7daccb8a7/ruby-25x-bundler2-rubygems-secure \
-           hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.2.sh b/rubies/heroku-18/ruby-2.5.2.sh
deleted file mode 100755
index 120122a..0000000
--- a/rubies/heroku-18/ruby-2.5.2.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output \
-           -v $CACHE_DIR:/tmp/cache \
-           -e VERSION=2.5.2 \
-           -e STACK=heroku-18 \
-           -e PATCH_URL=https://gist.githubusercontent.com/schneems/374157aff12e92babb1c6a3c6b744392/raw/c70aceeb7a97b8d8858234104afad0b7daccb8a7/ruby-25x-bundler2-rubygems-secure \
-           hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.3.sh b/rubies/heroku-18/ruby-2.5.3.sh
deleted file mode 100755
index f322ad4..0000000
--- a/rubies/heroku-18/ruby-2.5.3.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output \
-           -v $CACHE_DIR:/tmp/cache \
-           -e VERSION=2.5.3 \
-           -e STACK=heroku-18 \
-           -e PATCH_URL=https://gist.githubusercontent.com/schneems/374157aff12e92babb1c6a3c6b744392/raw/c70aceeb7a97b8d8858234104afad0b7daccb8a7/ruby-25x-bundler2-rubygems-secure \
-           hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.4.sh b/rubies/heroku-18/ruby-2.5.4.sh
deleted file mode 100755
index cdfcbdd..0000000
--- a/rubies/heroku-18/ruby-2.5.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.5.4  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.5.sh b/rubies/heroku-18/ruby-2.5.5.sh
deleted file mode 100755
index f9041e6..0000000
--- a/rubies/heroku-18/ruby-2.5.5.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.5.5  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.6.sh b/rubies/heroku-18/ruby-2.5.6.sh
deleted file mode 100755
index 580a7e8..0000000
--- a/rubies/heroku-18/ruby-2.5.6.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.5.6  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.7.sh b/rubies/heroku-18/ruby-2.5.7.sh
deleted file mode 100755
index 47120c5..0000000
--- a/rubies/heroku-18/ruby-2.5.7.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.5.7  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.8.sh b/rubies/heroku-18/ruby-2.5.8.sh
deleted file mode 100755
index a3d1ca3..0000000
--- a/rubies/heroku-18/ruby-2.5.8.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.5.8  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.5.9.sh b/rubies/heroku-18/ruby-2.5.9.sh
deleted file mode 100755
index b948f29..0000000
--- a/rubies/heroku-18/ruby-2.5.9.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.5.9  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.0-a94332819463589fe4537cc62beb41a0ee354cf3.sh b/rubies/heroku-18/ruby-2.6.0-a94332819463589fe4537cc62beb41a0ee354cf3.sh
deleted file mode 100755
index 1f83556..0000000
--- a/rubies/heroku-18/ruby-2.6.0-a94332819463589fe4537cc62beb41a0ee354cf3.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.0 -e PATCH_URL=https://github.com/ruby/ruby/commit/a94332819463589fe4537cc62beb41a0ee354cf3 -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.0-preview1.sh b/rubies/heroku-18/ruby-2.6.0-preview1.sh
deleted file mode 100755
index 660142f..0000000
--- a/rubies/heroku-18/ruby-2.6.0-preview1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.0-preview1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.0-preview2.sh b/rubies/heroku-18/ruby-2.6.0-preview2.sh
deleted file mode 100755
index 25cae57..0000000
--- a/rubies/heroku-18/ruby-2.6.0-preview2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.0-preview2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.0-rc1.sh b/rubies/heroku-18/ruby-2.6.0-rc1.sh
deleted file mode 100755
index 13bdbb1..0000000
--- a/rubies/heroku-18/ruby-2.6.0-rc1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.0-rc1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.0-rc2.sh b/rubies/heroku-18/ruby-2.6.0-rc2.sh
deleted file mode 100755
index 922d0b1..0000000
--- a/rubies/heroku-18/ruby-2.6.0-rc2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.0-rc2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.0.sh b/rubies/heroku-18/ruby-2.6.0.sh
deleted file mode 100755
index 1d4e319..0000000
--- a/rubies/heroku-18/ruby-2.6.0.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.0  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.1.sh b/rubies/heroku-18/ruby-2.6.1.sh
deleted file mode 100755
index 25975ca..0000000
--- a/rubies/heroku-18/ruby-2.6.1.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output \
-           -v $CACHE_DIR:/tmp/cache \
-           -e VERSION=2.6.1 \
-           -e PATCH_URL=https://gist.githubusercontent.com/schneems/fd2bd841515367871e5b332afe9455ea/raw/1de62a84bce330c9ca8336fddb7c143c36a01a1d/ruby-2.6.1-rubygems.patch \
-           -e STACK=heroku-18 \
-           hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.10.sh b/rubies/heroku-18/ruby-2.6.10.sh
deleted file mode 100755
index c4cc419..0000000
--- a/rubies/heroku-18/ruby-2.6.10.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.10  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.2.sh b/rubies/heroku-18/ruby-2.6.2.sh
deleted file mode 100755
index 15091fb..0000000
--- a/rubies/heroku-18/ruby-2.6.2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.4.sh b/rubies/heroku-18/ruby-2.6.4.sh
deleted file mode 100755
index 6199c0b..0000000
--- a/rubies/heroku-18/ruby-2.6.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.4  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.5.sh b/rubies/heroku-18/ruby-2.6.5.sh
deleted file mode 100755
index 11c362f..0000000
--- a/rubies/heroku-18/ruby-2.6.5.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.5  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.6.sh b/rubies/heroku-18/ruby-2.6.6.sh
deleted file mode 100755
index ceb5308..0000000
--- a/rubies/heroku-18/ruby-2.6.6.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.6  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.7.sh b/rubies/heroku-18/ruby-2.6.7.sh
deleted file mode 100755
index 11f726f..0000000
--- a/rubies/heroku-18/ruby-2.6.7.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.7  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.8.sh b/rubies/heroku-18/ruby-2.6.8.sh
deleted file mode 100755
index 75967a1..0000000
--- a/rubies/heroku-18/ruby-2.6.8.sh
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@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.8  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.6.9.sh b/rubies/heroku-18/ruby-2.6.9.sh
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index 57a5912..0000000
--- a/rubies/heroku-18/ruby-2.6.9.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.6.9  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.0-preview1.sh b/rubies/heroku-18/ruby-2.7.0-preview1.sh
deleted file mode 100755
index 65817b4..0000000
--- a/rubies/heroku-18/ruby-2.7.0-preview1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.0-preview1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.0-preview2.sh b/rubies/heroku-18/ruby-2.7.0-preview2.sh
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index 5ce8542..0000000
--- a/rubies/heroku-18/ruby-2.7.0-preview2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.0-preview2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.0-rc1.sh b/rubies/heroku-18/ruby-2.7.0-rc1.sh
deleted file mode 100755
index 4c10ba6..0000000
--- a/rubies/heroku-18/ruby-2.7.0-rc1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.0-rc1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.0-rc2.sh b/rubies/heroku-18/ruby-2.7.0-rc2.sh
deleted file mode 100755
index 172ea62..0000000
--- a/rubies/heroku-18/ruby-2.7.0-rc2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.0-rc2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.0.sh b/rubies/heroku-18/ruby-2.7.0.sh
deleted file mode 100755
index d0f2914..0000000
--- a/rubies/heroku-18/ruby-2.7.0.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.0  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.1.sh b/rubies/heroku-18/ruby-2.7.1.sh
deleted file mode 100755
index be0f023..0000000
--- a/rubies/heroku-18/ruby-2.7.1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.2.sh b/rubies/heroku-18/ruby-2.7.2.sh
deleted file mode 100755
index 8f8357d..0000000
--- a/rubies/heroku-18/ruby-2.7.2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.3.sh b/rubies/heroku-18/ruby-2.7.3.sh
deleted file mode 100755
index 4c4d7e1..0000000
--- a/rubies/heroku-18/ruby-2.7.3.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.3  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.4.sh b/rubies/heroku-18/ruby-2.7.4.sh
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index d021561..0000000
--- a/rubies/heroku-18/ruby-2.7.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.4  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.5.sh b/rubies/heroku-18/ruby-2.7.5.sh
deleted file mode 100755
index 6d248ee..0000000
--- a/rubies/heroku-18/ruby-2.7.5.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.5  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.6.sh b/rubies/heroku-18/ruby-2.7.6.sh
deleted file mode 100755
index ea4db2d..0000000
--- a/rubies/heroku-18/ruby-2.7.6.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.6  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.7.sh b/rubies/heroku-18/ruby-2.7.7.sh
deleted file mode 100755
index d6ee5e4..0000000
--- a/rubies/heroku-18/ruby-2.7.7.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.7  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-2.7.8.sh b/rubies/heroku-18/ruby-2.7.8.sh
deleted file mode 100755
index 9f3bfad..0000000
--- a/rubies/heroku-18/ruby-2.7.8.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=2.7.8  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.0-preview1.sh b/rubies/heroku-18/ruby-3.0.0-preview1.sh
deleted file mode 100755
index cdece1a..0000000
--- a/rubies/heroku-18/ruby-3.0.0-preview1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.0-preview1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.0-preview2.sh b/rubies/heroku-18/ruby-3.0.0-preview2.sh
deleted file mode 100755
index 2b65024..0000000
--- a/rubies/heroku-18/ruby-3.0.0-preview2.sh
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@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.0-preview2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.0-rc1.sh b/rubies/heroku-18/ruby-3.0.0-rc1.sh
deleted file mode 100755
index 8c4e4c4..0000000
--- a/rubies/heroku-18/ruby-3.0.0-rc1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.0-rc1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.0.sh b/rubies/heroku-18/ruby-3.0.0.sh
deleted file mode 100755
index 37fd064..0000000
--- a/rubies/heroku-18/ruby-3.0.0.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.0  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.1.sh b/rubies/heroku-18/ruby-3.0.1.sh
deleted file mode 100755
index 6e0d3a7..0000000
--- a/rubies/heroku-18/ruby-3.0.1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.2.sh b/rubies/heroku-18/ruby-3.0.2.sh
deleted file mode 100755
index d6b2cb7..0000000
--- a/rubies/heroku-18/ruby-3.0.2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.3.sh b/rubies/heroku-18/ruby-3.0.3.sh
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index 36953d7..0000000
--- a/rubies/heroku-18/ruby-3.0.3.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.3  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.4.sh b/rubies/heroku-18/ruby-3.0.4.sh
deleted file mode 100755
index f8f7cc0..0000000
--- a/rubies/heroku-18/ruby-3.0.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.4  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.5.sh b/rubies/heroku-18/ruby-3.0.5.sh
deleted file mode 100755
index e33fb35..0000000
--- a/rubies/heroku-18/ruby-3.0.5.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.5  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.0.6.sh b/rubies/heroku-18/ruby-3.0.6.sh
deleted file mode 100755
index 85b3a39..0000000
--- a/rubies/heroku-18/ruby-3.0.6.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.0.6  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.1.0-preview1.sh b/rubies/heroku-18/ruby-3.1.0-preview1.sh
deleted file mode 100755
index 4fed5b7..0000000
--- a/rubies/heroku-18/ruby-3.1.0-preview1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.1.0-preview1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.1.1.sh b/rubies/heroku-18/ruby-3.1.1.sh
deleted file mode 100755
index 2e63070..0000000
--- a/rubies/heroku-18/ruby-3.1.1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.1.1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.1.2.sh b/rubies/heroku-18/ruby-3.1.2.sh
deleted file mode 100755
index 768c647..0000000
--- a/rubies/heroku-18/ruby-3.1.2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.1.2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.1.3.sh b/rubies/heroku-18/ruby-3.1.3.sh
deleted file mode 100755
index 1e4311f..0000000
--- a/rubies/heroku-18/ruby-3.1.3.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.1.3  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.1.4.sh b/rubies/heroku-18/ruby-3.1.4.sh
deleted file mode 100755
index 63669a9..0000000
--- a/rubies/heroku-18/ruby-3.1.4.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.1.4  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.2.0-preview3.sh b/rubies/heroku-18/ruby-3.2.0-preview3.sh
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index 7e9f702..0000000
--- a/rubies/heroku-18/ruby-3.2.0-preview3.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.2.0-preview3  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.2.0-rc1.sh b/rubies/heroku-18/ruby-3.2.0-rc1.sh
deleted file mode 100755
index 9a1ac4c..0000000
--- a/rubies/heroku-18/ruby-3.2.0-rc1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.2.0-rc1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.2.0.sh b/rubies/heroku-18/ruby-3.2.0.sh
deleted file mode 100755
index 6f10bfa..0000000
--- a/rubies/heroku-18/ruby-3.2.0.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.2.0  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.2.1.sh b/rubies/heroku-18/ruby-3.2.1.sh
deleted file mode 100755
index e3e750e..0000000
--- a/rubies/heroku-18/ruby-3.2.1.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.2.1  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-3.2.2.sh b/rubies/heroku-18/ruby-3.2.2.sh
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index df291e4..0000000
--- a/rubies/heroku-18/ruby-3.2.2.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=3.2.2  -e STACK=heroku-18 hone/ruby-builder:heroku-18
diff --git a/rubies/heroku-18/ruby-9.3.4.0.sh b/rubies/heroku-18/ruby-9.3.4.0.sh
deleted file mode 100755
index 98bf043..0000000
--- a/rubies/heroku-18/ruby-9.3.4.0.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-source `dirname $0`/../common.sh
-
-docker run -v $OUTPUT_DIR:/tmp/output -v $CACHE_DIR:/tmp/cache -e VERSION=9.3.4.0  -e STACK=heroku-18 hone/ruby-builder:heroku-18