diff --git a/contrib/teamcity/gitian.sh b/contrib/teamcity/gitian.sh
--- a/contrib/teamcity/gitian.sh
+++ b/contrib/teamcity/gitian.sh
@@ -18,11 +18,22 @@
 cd ~/gitian-builder
 
 if [[ "${OS_NAME}" == "osx" ]]; then
-  wget https://storage.googleapis.com/f4936e83b2dcbca742be51fb9692b153/MacOSX10.11.sdk.tar.gz
-  echo "4732b52b5ebe300c8c91cbeed6d19d59c1ff9c56c7a1dd6cfa518b9c2c72abde  MacOSX10.11.sdk.tar.gz" | sha256sum -c
+  OSX_SDK="MacOSX10.11.sdk.tar.gz"
+  OSX_SDK_SHA256="4732b52b5ebe300c8c91cbeed6d19d59c1ff9c56c7a1dd6cfa518b9c2c72abde"
+  DOWNLOAD_OSX_SDK="yes"
   mkdir -p inputs
-  echo "Downloaded"
-  mv MacOSX10.11.sdk.tar.gz inputs
+  pushd inputs
+  if [ -f "${OSX_SDK}" ]; then
+    echo "${OSX_SDK_SHA256}  ${OSX_SDK}" | sha256sum -c && DOWNLOAD_OSX_SDK="no"
+  fi
+
+  echo "Will download '${OSX_SDK}'? ${DOWNLOAD_OSX_SDK}"
+  if [ "${DOWNLOAD_OSX_SDK}" == "yes" ]; then
+    wget https://storage.googleapis.com/f4936e83b2dcbca742be51fb9692b153/"${OSX_SDK}"
+    echo "${OSX_SDK_SHA256}  ${OSX_SDK}" | sha256sum -c
+    echo "Finished downloading '${OSX_SDK}'"
+  fi
+  popd
 fi
 
 ## Determine the number of build threads