diff --git a/.github/workflows/alpha.yml b/.github/workflows/alpha.yml
index 0cdc07263..390716ce6 100644
--- a/.github/workflows/alpha.yml
+++ b/.github/workflows/alpha.yml
@@ -183,13 +183,36 @@ jobs:
           name: zen.source.tar.gz
           path: ./zen.source.tar.gz
 
+  windows-step-1:
+    name: Windows build step 1 (PGO build)
+    uses: ./.github/workflows/windows-alpha-build.yml
+    needs: [build-data]
+    permissions:
+      contents: write
+    secrets: inherit
+    with:
+      build-version: ${{ needs.build-data.outputs.version }}
+      generate-gpo: true
+      profile-data-path-archive: zen-windows-x86_64-profile-data-and-jarlog.zip
+
+  windows-step-2:
+    name: Windows build step 2 (Generate profile data)
+    uses: ./.github/workflows/windows-profile-build.yml
+    permissions:
+      contents: write
+    secrets: inherit
+    needs: [windows-step-1, build-data]
+    with:
+      build-version: ${{ needs.build-data.outputs.version }}
+      profile-data-path-archive: zen.win64-pgo-stage-1.zip
+
   windows-step-3:
     name: Windows build step 3 (build with profile data)
     uses: ./.github/workflows/windows-alpha-build.yml
     permissions:
       contents: write
     secrets: inherit
-    needs: [build-data]
+    needs: [build-data, windows-step-2]
     with:
       build-version: ${{ needs.build-data.outputs.version }}
       generate-gpo: false
diff --git a/configs/windows/mozconfig b/configs/windows/mozconfig
index 54a1fb638..3101401b0 100644
--- a/configs/windows/mozconfig
+++ b/configs/windows/mozconfig
@@ -52,4 +52,15 @@ fi
 export POLLY="-mllvm -polly -mllvm -polly-2nd-level-tiling -mllvm -polly-loopfusion-greedy -mllvm -polly-pattern-matching-based-opts -mllvm -polly-position=before-vectorizer -mllvm -polly-vectorizer=stripmine"
 export VERBOSE=1
 
+if test "$ZEN_CROSS_COMPILING"; then
+  if test "$ZEN_GA_GENERATE_PROFILE"; then
+    export CXXFLAGS="$CXXFLAGS -fprofile-generate -mllvm -enable-name-compression=false -mllvm -pgo-temporal-instrumentation -fprofile-update=atomic"
+    mk_add_options "export MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES=0"
+    ac_add_options --enable-profile-generate=cross
+  else
+    ac_add_options --enable-profile-use=cross
+    ac_add_options --with-pgo-profile-path=$(echo ~)/artifact/merged.profdata
+    ac_add_options --with-pgo-jarlog=$(echo ~)/artifact/en-US.log
+  fi
 
+fi