diff --git a/.github/workflows/build-reusable.yaml b/.github/workflows/build-reusable.yaml
index d90aee0b..a80f728b 100644
--- a/.github/workflows/build-reusable.yaml
+++ b/.github/workflows/build-reusable.yaml
@@ -60,6 +60,9 @@ on:
 
 env:
   MAVEN_ARGS: ${{ inputs.maven-args }}
+  # Keep `maven.multiModuleProjectDirectory` a native Windows path under `shell: bash`,
+  # See https://github.com/apache/maven/issues/12537 for context.
+  MAVEN_BASEDIR: ${{ github.workspace }}
 
 # Explicitly drop all permissions inherited from the caller for security.
 # Reference: https://docs.github.com/en/actions/sharing-automations/reusing-workflows#access-and-permissions
diff --git a/.github/workflows/verify-reproducibility-reusable.yaml b/.github/workflows/verify-reproducibility-reusable.yaml
index 99f791e6..e8728caa 100644
--- a/.github/workflows/verify-reproducibility-reusable.yaml
+++ b/.github/workflows/verify-reproducibility-reusable.yaml
@@ -38,6 +38,9 @@ on:
 env:
   MAVEN_ARGS: ${{ inputs.maven-args }}
   NEXUS_URL: ${{ inputs.nexus-url }}
+  # Keep `maven.multiModuleProjectDirectory` a native Windows path under `shell: bash`,
+  # See https://github.com/apache/maven/issues/12537 for context.
+  MAVEN_BASEDIR: ${{ github.workspace }}
 
 # Explicitly drop all permissions inherited from the caller for security.
 # Reference: https://docs.github.com/en/actions/sharing-automations/reusing-workflows#access-and-permissions