diff --git a/build.sh b/build.sh
index 1fc2b655..6adaae18 100755
--- a/build.sh
+++ b/build.sh
@@ -4,13 +4,16 @@
 set -e -x -u
 
 OSNAME=$(uname -s)
-if [[ "$OSNAME" == "Darwin" ]]; then
-  alias nproc="sysctl -n hw.logicalcpu"
+if [ -z ${CPU_NUMBER+x} ]; then
+  if [[ "$OSNAME" == "Darwin" ]]; then
+    CPU_NUMBER=$(sysctl -n hw.logicalcpu)
+  else
+    CPU_NUMBER=$(nproc)
+  fi
 fi
 
 BUILD_FLAVOR=RelWithDebInfo
 target_dir=out/$OSNAME/$BUILD_FLAVOR
 mkdir -p "$target_dir" && cd "$target_dir"
-if [ -z ${CPU_NUMBER+x} ]; then CPU_NUMBER=$(nproc); fi
 # it looks the parallel build on CI pipeline machine causes crashes.
 cmake "$@" ../../.. && cmake --build . --config $BUILD_FLAVOR  --parallel "${CPU_NUMBER}"
diff --git a/setup.py b/setup.py
index 32b9d927..1fe3841c 100644
--- a/setup.py
+++ b/setup.py
@@ -126,10 +126,14 @@ def read_version():
             version_str = line[0].split('=')[1].strip('" \n\r')
 
     # is it a dev build or release?
-    if os.path.isdir(os.path.join(TOP_DIR, '.git')):
-        rel_br, cid = read_git_refs()
-        if not rel_br:
-            version_str += '+' + cid[:7]
+    build_id = os.getenv('BUILD_BUILDID', None)
+    if build_id is not None:
+        version_str += '.{}'.format(build_id)
+    else:
+        if os.path.isdir(os.path.join(TOP_DIR, '.git')):
+            rel_br, cid = read_git_refs()
+            if not rel_br:
+                version_str += '+' + cid[:7]
     return version_str