diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index e1711931e4..0312ef5de9 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -100,13 +100,13 @@ jobs:
           key: libs-x86-macos-13-${{ hashFiles('Makefile', 'CMakeLists.txt', 'libs/CMakeLists.txt') }}
       - name: Build Debug Runtime
         run: |
-          make configure arch=x86-64 config=debug
+          make configure lto=yes arch=x86-64 config=debug
           make build config=debug
       - name: Test with Debug Runtime
         run: make test-ci config=debug usedebugger=lldb
       - name: Build Release Runtime
         run: |
-          make configure arch=x86-64 config=release
+          make configure lto=yes arch=x86-64 config=release
           make build config=release
       - name: Test with Release Runtime
         run: make test-ci config=release usedebugger=lldb
@@ -135,13 +135,13 @@ jobs:
           key: libs-x86-macos-12-${{ hashFiles('Makefile', 'CMakeLists.txt', 'libs/CMakeLists.txt') }}
       - name: Build Debug Runtime
         run: |
-          make configure arch=x86-64 config=debug
+          make configure lto=yes arch=x86-64 config=debug
           make build config=debug
       - name: Test with Debug Runtime
         run: make test-ci config=debug
       - name: Build Release Runtime
         run: |
-          make configure arch=x86-64 config=release
+          make configure lto=yes arch=x86-64 config=release
           make build config=release
       - name: Test with Release Runtime
         run: make test-ci config=release