diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d5efe37..79d61d4 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -2,7 +2,14 @@
 name: CI
 # yamllint disable-line rule:truthy
 on:
-  [push]
+  push:
+  workflow_dispatch:
+    inputs:
+      KERNEL_VERSION:
+        required: false
+        type: string
+        default: ''
+        description: (optional) Choose kernel version to use from T2Linux. Without the "v".
 
 jobs:
   build:
@@ -12,13 +19,37 @@ jobs:
 
       - name: Configure variables
         id: variables
+        if: ${{ inputs.KERNEL_VERSION == '' }}
         run: |
           KERNEL_VERSION=$(curl -Ls https://github.com/t2linux/T2-Ubuntu-Kernel/releases/ | grep deb | grep download | grep "${MBP_VERSION}" | cut -d'/' -f6 | head -n1 | cut -d'v' -f2)
           echo "::set-output name=build::${KERNEL_VERSION}"
 
-      - name: Build
+      - name: Download kernel packages
         env:
           KERNEL_VERSION: ${{ steps.variables.outputs.build }}
+        run: |
+          KERNEL_PACKAGES=()
+          if [[ -n "${KERNEL_VERSION:-}" ]]; then
+            MBP_KERNEL_TAG=${KERNEL_VERSION}
+            echo >&2 "===]> Info: Downloading specified kernel: ${MBP_KERNEL_TAG}";
+          else
+            MBP_VERSION=t2
+            MBP_KERNEL_TAG=$(curl -Ls https://github.com/t2linux/T2-Ubuntu-Kernel/releases/ | grep deb | grep download | grep "${MBP_VERSION}" | cut -d'/' -f6 | head -n1 | cut -d'v' -f2)
+            echo >&2 "===]> Info: Downloading latest ${MBP_VERSION} kernel: ${MBP_KERNEL_TAG}";
+          fi
+
+          while IFS='' read -r line; do KERNEL_PACKAGES+=("$line"); done <  <(curl -sL https://github.com/t2linux/T2-Ubuntu-Kernel/releases/tag/v"${MBP_KERNEL_TAG}" | grep deb | grep span | cut -d'>' -f2 | cut -d'<' -f1)
+
+          mkdir -p "${{ github.workspace }}/files/kernels"
+
+          for i in "${KERNEL_PACKAGES[@]}"; do
+            curl -L  https://github.com/t2linux/T2-Ubuntu-Kernel/releases/download/v"${MBP_KERNEL_TAG}"/"${i}" -o "${{ github.workspace }}/files/kernels/${i}"
+          done
+
+      - name: Check kernel files
+        run: ls -al "${{ github.workspace }}/files/kernels"
+
+      - name: Build
         run: sudo ./build.sh
 
       - name: print sha256sum
@@ -32,21 +63,21 @@ jobs:
 
       - name: Instructions for putting it back together
         run: |
-          echo "${{ github.workspace }}Release.txt"
-          echo 'Download all the artifacts, and put them in a folder' > ${{ github.workspace }}Release.txt
-          echo 'without other files. Then run:' >> ${{ github.workspace }}Release.txt
-          echo '`unzip "*.z??.zip"`' >> ${{ github.workspace }}Release.txt
-          echo '`cat livecd-${{ steps.variables.outputs.build }}-mbp.z?? > cd.zip`' >> ${{ github.workspace }}Release.txt
-          echo '`unzip cd.zip`' >> ${{ github.workspace }}Release.txt
+          echo "${{ github.workspace }}/Release.txt"
+          echo 'Download all the artifacts, and put them in a folder' > ${{ github.workspace }}/Release.txt
+          echo 'without other files. Then run:' >> ${{ github.workspace }}/Release.txt
+          echo '`unzip "*.z??.zip"`' >> ${{ github.workspace }}/Release.txt
+          echo '`cat livecd-${{ steps.variables.outputs.build }}-mbp.z?? > cd.zip`' >> ${{ github.workspace }}/Release.txt
+          echo '`unzip cd.zip`' >> ${{ github.workspace }}/Release.txt
 
       - name: Test release text
-        run: cat ${{ github.workspace }}Release.txt
+        run: cat ${{ github.workspace }}/Release.txt
       - name: Release
         if: github.ref == 'refs/heads/master'
         uses: softprops/action-gh-release@v1
         with:
           files: ${{ github.workspace }}/output/*
-          body_path: ${{ github.workspace }}Release.txt
+          body_path: ${{ github.workspace }}/Release.txt
           tag_name: v20.04-${{ steps.variables.outputs.build }}
           draft: true
         env:
diff --git a/01_build_file_system.sh b/01_build_file_system.sh
index 2d57ae7..6218bc9 100755
--- a/01_build_file_system.sh
+++ b/01_build_file_system.sh
@@ -9,25 +9,6 @@ debootstrap \
   "${CHROOT_PATH}" \
   http://archive.ubuntu.com/ubuntu/
 
-### Download kernel packages
-KERNEL_PACKAGES=()
-if [[ -n "${KERNEL_VERSION:-}" ]]; then
-  MBP_KERNEL_TAG=${KERNEL_VERSION}
-  echo >&2 "===]> Info: Downloading specified kernel: ${MBP_KERNEL_TAG}";
-else
-  MBP_VERSION=t2
-  MBP_KERNEL_TAG=$(curl -Ls https://github.com/t2linux/T2-Ubuntu-Kernel/releases/ | grep deb | grep download | grep "${MBP_VERSION}" | cut -d'/' -f6 | head -n1 | cut -d'v' -f2)
-  echo >&2 "===]> Info: Downloading latest ${MBP_VERSION} kernel: ${MBP_KERNEL_TAG}";
-fi
-
-while IFS='' read -r line; do KERNEL_PACKAGES+=("$line"); done <  <(curl -sL https://github.com/t2linux/T2-Ubuntu-Kernel/releases/tag/v"${MBP_KERNEL_TAG}" | grep deb | grep span | cut -d'>' -f2 | cut -d'<' -f1)
-
-mkdir -p "${ROOT_PATH}/files/kernels"
-
-for i in "${KERNEL_PACKAGES[@]}"; do
-  curl -L  https://github.com/t2linux/T2-Ubuntu-Kernel/releases/download/v"${MBP_KERNEL_TAG}"/"${i}" -o "${ROOT_PATH}/files/kernels/${i}"
-done
-
 echo >&2 "===]> Info: Creating chroot environment... "
 mount --bind /dev "${CHROOT_PATH}/dev"
 mount --bind /run "${CHROOT_PATH}/run"