diff --git a/.github/build_macos.sh b/.github/build_macos.sh
index fd75ed45..cf45a4d3 100755
--- a/.github/build_macos.sh
+++ b/.github/build_macos.sh
@@ -33,10 +33,11 @@ fpc_lazarus_build_install() {
   mkdir -p "$sdk_dir"
   cd "$sdk_dir"
 
-  readonly fpc324_rc1_commit='d78e2897014a69f56a1cfb53c75335c4cc37ba0e'
-  curl -L -o fpc-src.tar.bz2 "https://gitlab.com/freepascal.org/fpc/source/-/archive/${fpc324_rc1_commit}/source-${fpc324_rc1_commit}.tar.bz2"
+  # use a private fork which includes a fix for compilation under Sequoia
+  readonly fpc324_rc1_commit='dae96b96a1839e1a3624c664d6293661cc4bed67'
+  curl -L -o fpc-src.tar.bz2 "https://gitlab.com/dkk089/fpc-src/-/archive/${fpc324_rc1_commit}/fpc-src-${fpc324_rc1_commit}.tar.bz2"
   tar xf fpc-src.tar.bz2
-  mv "source-${fpc324_rc1_commit}" fpc-src
+  mv "fpc-src-${fpc324_rc1_commit}" fpc-src
   cd fpc-src
 
   mkdir -p "${fpc_installdir}"
@@ -59,7 +60,7 @@ fpc_lazarus_build_install() {
   make_fpc_cfg
 
   cd "$sdk_dir"
-  local -r lazarus_commit='4e69368d79e3801ad26a7bc7c1eda0ad3cf7dcc4'
+  local -r lazarus_commit='dab5c509c6fd70f8fac2144e468291899286616f'
   curl -L -o lazarus-src.tar.bz2 "https://gitlab.com/dkk089/lazarus/-/archive/${lazarus_commit}/lazarus-${lazarus_commit}.tar.bz2"
   tar xf lazarus-src.tar.bz2
   mv "lazarus-${lazarus_commit}" lazarus
diff --git a/.github/build_windows.ps1 b/.github/build_windows.ps1
index c8532508..0aa800af 100644
--- a/.github/build_windows.ps1
+++ b/.github/build_windows.ps1
@@ -28,7 +28,7 @@ function FPC-Lazarus-Build-Install {
 
     $env:Path = "${fpc322}\bin\i386-win32;" + $env:Path
 
-    $fpc324_commit = 'd78e2897014a69f56a1cfb53c75335c4cc37ba0e'
+    $fpc324_commit = 'cd84c2d5cd1f7b17de0ca0b62c3d35c661f535b1'
     My-Download -Uri "https://gitlab.com/freepascal.org/fpc/source/-/archive/${fpc324_commit}/source-${fpc324_commit}.zip" -OutFile fpc-324-rc1.zip
 
     # we could use Expand-Archive but it takes an eternity and then some
@@ -43,7 +43,7 @@ function FPC-Lazarus-Build-Install {
     fpcmkcfg -d basepath=${fpc324} -o "${fpc324}\bin\i386-win32\fpc.cfg"
 
     cd "$sdk_dir"
-    $lazarus_commit = '4e69368d79e3801ad26a7bc7c1eda0ad3cf7dcc4'
+    $lazarus_commit = 'dab5c509c6fd70f8fac2144e468291899286616f'
     My-Download -Uri "https://gitlab.com/dkk089/lazarus/-/archive/${lazarus_commit}/lazarus-${lazarus_commit}.zip" -OutFile lazarus-src.zip
     7z x lazarus-src.zip
 
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 59733e73..f066955c 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -10,7 +10,7 @@ jobs:
   build-linux:
 
     runs-on: ubuntu-latest
-    container: lighterowl/transgui-sdk:1.1
+    container: lighterowl/transgui-sdk:1.2
 
     steps:
     - uses: actions/checkout@v1