diff --git a/.github/workflows/sbcl.yml b/.github/workflows/sbcl.yml
index b75141f..8a85bd4 100644
--- a/.github/workflows/sbcl.yml
+++ b/.github/workflows/sbcl.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-20.04]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -25,19 +25,26 @@ jobs:
         run: |
           sudo apt update -y
           sudo apt install build-essential -y
-          sudo apt install sbcl libzstd-dev -y
+          sudo apt install libzstd-dev -y
       - name: build
         run: |
+          # use custom built sbcl for grandpa ubuntu
+          # otherwise, it won't build
+          curl -o install_root.zip -L https://github.com/VitoVan/calm/releases/download/sbcl-2.3.4/install_root-ubuntu-20.04.zip
+          unzip install_root.zip
+          mv ./install_root ./sbcl
+          export PATH=$(pwd)/sbcl/bin:$PATH
+          # start building new sbcl
           set -x
-          curl -OL http://downloads.sourceforge.net/project/sbcl/sbcl/2.3.4/sbcl-2.3.4-source.tar.bz2
+          curl -OL http://downloads.sourceforge.net/project/sbcl/sbcl/2.4.7/sbcl-2.4.7-source.tar.bz2
           set +x
-          bzip2 -cd sbcl-2.3.4-source.tar.bz2 | tar xvf -
-          cd sbcl-2.3.4
-          sh make.sh --with-fancy --with-sb-core-compression
+          bzip2 -cd sbcl-2.4.7-source.tar.bz2 | tar xvf -
+          cd sbcl-2.4.7
+          sh make.sh --with-sb-thread --with-sb-core-compression
       - name: zip install_root
         run: |
           set -x
-          cd sbcl-2.3.4
+          cd sbcl-2.4.7
           export INSTALL_ROOT=$HOME/install_root
           sh install.sh
           cd ..
@@ -58,7 +65,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [macos-11, macos-12, macos-13]
+        os: [macos-12, macos-13, macos-14]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -69,19 +76,23 @@ jobs:
       - name: install
         shell: bash
         run: |
-          brew install sbcl
+          brew update && brew install sbcl && brew fetch zstd && brew reinstall zstd
       - name: build
         run: |
+          # for newer version of homebrew, the location of files has changed
+          export CPATH=$(brew --prefix zstd)/include:/usr/local/include:$CPATH
+          export LIBRARY_PATH=$(brew --prefix zstd)/lib/:$LIBRARY_PATH
+          # start building
           set -x
-          curl -OL http://downloads.sourceforge.net/project/sbcl/sbcl/2.3.4/sbcl-2.3.4-source.tar.bz2
+          curl -OL http://downloads.sourceforge.net/project/sbcl/sbcl/2.4.7/sbcl-2.4.7-source.tar.bz2
           set +x
-          bzip2 -cd sbcl-2.3.4-source.tar.bz2 | tar xvf -
-          cd sbcl-2.3.4
-          sh make.sh --with-fancy --with-sb-core-compression
+          bzip2 -cd sbcl-2.4.7-source.tar.bz2 | tar xvf -
+          cd sbcl-2.4.7
+          sh make.sh --with-sb-thread --with-sb-core-compression
       - name: zip install_root
         run: |
           set -x
-          cd sbcl-2.3.4
+          cd sbcl-2.4.7
           export INSTALL_ROOT=$HOME/install_root
           sh install.sh
           cd ..
@@ -102,7 +113,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [windows-2022, windows-2019]
+        os: [windows-2019]
 
     defaults:
       run:
@@ -129,14 +140,14 @@ jobs:
         run: |
           wget http://prdownloads.sourceforge.net/sbcl/sbcl-2.2.7-x86-64-windows-binary.msi
           7z x sbcl-2.2.7-x86-64-windows-binary.msi -Osbcl-2.2.7-bin && rm sbcl-2.2.7-x86-64-windows-binary.msi
-          wget http://downloads.sourceforge.net/project/sbcl/sbcl/2.3.4/sbcl-2.3.4-source.tar.bz2
-          bzip2 -cd sbcl-2.3.4-source.tar.bz2 | tar xvf -
-          cd sbcl-2.3.4
-          PATH=$PATH:"../sbcl-2.2.7-bin/" SBCL_HOME="../sbcl-2.2.7-bin/" sh make.sh --xc-host='sbcl --lose-on-corruption --disable-ldb --disable-debugger' --with-fancy --with-sb-core-compression
+          wget http://downloads.sourceforge.net/project/sbcl/sbcl/2.4.7/sbcl-2.4.7-source.tar.bz2
+          bzip2 -cd sbcl-2.4.7-source.tar.bz2 | tar xvf -
+          cd sbcl-2.4.7
+          PATH=$PATH:"../sbcl-2.2.7-bin/" SBCL_HOME="../sbcl-2.2.7-bin/" sh make.sh --xc-host='sbcl --lose-on-corruption --disable-ldb --disable-debugger' --with-sb-thread --with-sb-core-compression
       - name: zip install_root
         run: |
           set -x
-          cd sbcl-2.3.4
+          cd sbcl-2.4.7
           export INSTALL_ROOT=$HOME/install_root
           sh install.sh
           cd ..