diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 45ad4d3fbb..e4a7f5b38c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,7 +11,7 @@ concurrency:
 
 env:
   CLANG_VERSION: 15.0.6
-  LLVM_VERSION: bfcdb95c
+  LLVM_VERSION: 8be1f3ba
 
 jobs:
   build-native:
@@ -66,7 +66,7 @@ jobs:
             # -DD_LINKER_ARGS="-Wl,-lto_library,$PWD/../bootstrap-ldc/lib/libLTO.dylib;-L$PWD/../bootstrap-ldc/lib;-lphobos2-ldc-lto;-ldruntime-ldc-lto;-Wl,-exported_symbol,__*;-Wl,-w"
             # -DEXTRA_CXXFLAGS=-flto=full
             # -DD_COMPILER_FLAGS="-gcc=/usr/bin/c++ -O -flto=full -defaultlib=phobos2-ldc-lto,druntime-ldc-lto -L-exported_symbol '-L__*' -L-w"
-            with_pgo: true
+            with_pgo: false
 
           - job_name: Windows x64
             os: windows-2022