diff --git a/.github/workflows/sanitizers-cmake.yml b/.github/workflows/sanitizers-cmake.yml
index e3c5ff87638..deda8b0070b 100644
--- a/.github/workflows/sanitizers-cmake.yml
+++ b/.github/workflows/sanitizers-cmake.yml
@@ -25,7 +25,7 @@ jobs:
         working-directory: ${{github.workspace}}/build
         run: |
           cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=RelWithDebInfo -DDEBUG_MEMORY=${{ matrix.sanitizer }} -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++
-          cmake --build . --parallel
+          cmake --build . -j2
 
       - name: Run
         working-directory: ${{github.workspace}}/build
@@ -51,7 +51,7 @@ jobs:
         working-directory: ${{github.workspace}}/build
         run: |
           cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=Debug -DDEBUG_MEMORY=${{ matrix.sanitizer }} -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++
-          cmake --build . --parallel
+          cmake --build . -j2
 
       - name: Run
         working-directory: ${{github.workspace}}/build
@@ -77,7 +77,7 @@ jobs:
         working-directory: ${{github.workspace}}/build
         run: |
           cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=RelWithDebInfo -DDEBUG_MEMORY=${{ matrix.sanitizer }} -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
-          cmake --build . --parallel
+          cmake --build . -j2
 
       - name: Run
         working-directory: ${{github.workspace}}/build
@@ -103,7 +103,7 @@ jobs:
         working-directory: ${{github.workspace}}/build
         run: |
           cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=Debug -DDEBUG_MEMORY=${{ matrix.sanitizer }} -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
-          cmake --build . --parallel
+          cmake --build . -j2
 
       - name: Run
         working-directory: ${{github.workspace}}/build
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f28998adb01..6892f02f363 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -400,6 +400,11 @@ if (BUILD_CXX)
       message(STATUS "IPO / LTO is not supported for 32-bit linux.")
   endif()
 
+  if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+      set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)
+      message(STATUS "IPO / LTO: disabled for Debug build")
+  endif()
+
 endif()