diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9911ffb681..cc1881a4df 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -33,6 +33,8 @@ jobs:
         ###################
       - name: Build
         run: GOARCH=${{ matrix.go-arch }} make build
+      - name: Build with legacy app.go
+        run: GOARCH=${{ matrix.go-arch }} COSMOS_BUILD_OPTIONS="legacy" make build
       # TODO re-add with comet v1
       #- name: Build with BLS12381
       #  if: matrix.go-arch == 'amd64'
@@ -40,6 +42,9 @@ jobs:
       - name: Build with Secp_cgo
         if: matrix.go-arch == 'amd64'
         run: GOARCH=${{ matrix.go-arch }} COSMOS_BUILD_OPTIONS="secp" make build
+      - name: Build with legacy app.go and Secp_cgo
+        if: matrix.go-arch == 'amd64'
+        run: GOARCH=${{ matrix.go-arch }} COSMOS_BUILD_OPTIONS="legacy,secp" make build
         ###################
         ## Build Tooling ##
         ###################