diff --git a/.github/workflows/CI-unixish.yml b/.github/workflows/CI-unixish.yml
index f5f25d51b..62007c40b 100644
--- a/.github/workflows/CI-unixish.yml
+++ b/.github/workflows/CI-unixish.yml
@@ -85,6 +85,18 @@ jobs:
           sudo apt-get update
           sudo apt-get install libxml2-utils qtbase5-dev qttools5-dev libqt5charts5-dev qtchooser
 
+      - name: Set up GCC
+        uses: egor-tensin/setup-gcc@v1
+        if: matrix.os == 'ubuntu-22.04'
+        with:
+          version: 13
+          platform: x64
+
+      - name: Select compiler
+        run: |
+          echo "CXX=g++-13" >> $GITHUB_ENV
+        if: matrix.os == 'ubuntu-22.04'
+
       # coreutils contains "nproc"
       - name: Install missing software on macos
         if: contains(matrix.os, 'macos')
diff --git a/gui/CMakeLists.txt b/gui/CMakeLists.txt
index c646f15fd..2614b1a76 100644
--- a/gui/CMakeLists.txt
+++ b/gui/CMakeLists.txt
@@ -9,10 +9,10 @@ CheckOptions:
   - { key: HeaderFileExtensions,          value: 'x' }
 ")
 
-    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:-DQT_NO_DEBUG>)
-    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:-DQT_NO_DEBUG_OUTPUT>)
-    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:-DQT_NO_WARNING_OUTPUT>)
-    add_compile_definitions($<$<CONFIG:Debug>:-DQT_DEBUG>)
+    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:QT_NO_DEBUG>)
+    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:QT_NO_DEBUG_OUTPUT>)
+    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:QT_NO_WARNING_OUTPUT>)
+    add_compile_definitions($<$<CONFIG:Debug>:QT_DEBUG>)
 
     file(GLOB hdrs "*.h")
     file(GLOB srcs "*.cpp")
diff --git a/tools/triage/CMakeLists.txt b/tools/triage/CMakeLists.txt
index 73cf887ba..c244144f8 100644
--- a/tools/triage/CMakeLists.txt
+++ b/tools/triage/CMakeLists.txt
@@ -8,10 +8,10 @@ CheckOptions:
   - { key: HeaderFileExtensions,          value: 'x' }
 ")
 
-    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:-DQT_NO_DEBUG>)
-    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:-DQT_NO_DEBUG_OUTPUT>)
-    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:-DQT_NO_WARNING_OUTPUT>)
-    add_compile_definitions($<$<CONFIG:Debug>:-DQT_DEBUG>)
+    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:QT_NO_DEBUG>)
+    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:QT_NO_DEBUG_OUTPUT>)
+    add_compile_definitions($<$<NOT:$<CONFIG:Debug>>:QT_NO_WARNING_OUTPUT>)
+    add_compile_definitions($<$<CONFIG:Debug>:QT_DEBUG>)
 
     file(GLOB hdrs "*.h")
     file(GLOB srcs "*.cpp")