diff --git a/.dockerignore b/.dockerignore
deleted file mode 100644
index a116ad4..0000000
--- a/.dockerignore
+++ /dev/null
@@ -1,2 +0,0 @@
-**/**
-!hack/
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index c266cc9..c2b7d63 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -23,8 +23,9 @@ jobs:
          - 5000:5000
     steps:
       - name: Checkout
-        id: checkout
         uses: actions/checkout@v2
+      - name: Unshallow
+        run: git fetch --prune --unshallow
       - name: Set up QEMU
         id: qemu
         uses: docker/setup-qemu-action@v1
@@ -54,6 +55,7 @@ jobs:
           key: ${{ runner.os }}-buildx-ghcache-${{ github.sha }}
           restore-keys: |
             ${{ runner.os }}-buildx-ghcache-
+      - run: cat ./hack/Makefile
       - name: Build candidate image
         id: build_candidate
         uses: docker/build-push-action@v2
diff --git a/Dockerfile b/Dockerfile
index ae5b0f9..42f068d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,3 @@
 FROM scratch
 
-COPY hack/Makefile Makefile
+COPY ./hack/Makefile Makefile
diff --git a/Dockerfile.test b/Dockerfile.test
index 2930eab..9ab5b7a 100644
--- a/Dockerfile.test
+++ b/Dockerfile.test
@@ -1,6 +1,6 @@
 # This Dockerfile tests the hack/Makefile output against git2go.
 ARG BASE_VARIANT=bullseye
-ARG GO_VERSION=1.16.8
+ARG GO_VERSION=1.17.3
 ARG XX_VERSION=1.0.0-rc.2
 
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
@@ -12,7 +12,7 @@ FROM gostable AS go-linux
 FROM go-${TARGETOS} AS build-base-bullseye
 
 COPY --from=xx / /
-COPY hack/Makefile /libgit2/Makefile
+COPY ./hack/Makefile /libgit2/Makefile
 
 RUN make -C /libgit2/ cmake