diff --git a/Telegram/build/docker/centos_env/Dockerfile b/Telegram/build/docker/centos_env/Dockerfile
index 8ef6e92633..2f013df80d 100644
--- a/Telegram/build/docker/centos_env/Dockerfile
+++ b/Telegram/build/docker/centos_env/Dockerfile
@@ -48,7 +48,7 @@ ENV LDFLAGS='{% if not LTO %}-fuse-ld=lld{% endif %} -static-libstdc++ -static-l
 
 ENV CMAKE_GENERATOR=Ninja
 ENV CMAKE_BUILD_TYPE=None
-ENV CMAKE_BUILD_PARALLEL_LEVEL=
+ENV CMAKE_BUILD_PARALLEL_LEVEL='{{ JOBS }}'
 
 RUN git init Implib.so \
 	&& cd Implib.so \
diff --git a/Telegram/build/docker/centos_env/gen_dockerfile.py b/Telegram/build/docker/centos_env/gen_dockerfile.py
index 997b784caf..96269eba6e 100755
--- a/Telegram/build/docker/centos_env/gen_dockerfile.py
+++ b/Telegram/build/docker/centos_env/gen_dockerfile.py
@@ -4,12 +4,15 @@ from os.path import dirname
 from jinja2 import Environment, FileSystemLoader
 
 def checkEnv(envName, defaultValue):
-    return bool(len(environ[envName])) if envName in environ else defaultValue
+    if isinstance(defaultValue, bool):
+        return bool(len(environ[envName])) if envName in environ else defaultValue
+    return environ[envName] if envName in environ else defaultValue
 
 def main():
     print(Environment(loader=FileSystemLoader(dirname(__file__))).get_template("Dockerfile").render(
         DEBUG=checkEnv("DEBUG", True),
         LTO=checkEnv("LTO", True),
+        JOBS=checkEnv("JOBS", ""),
     ))
 
 if __name__ == '__main__':