diff --git a/paddle/math/BaseMatrix.cu b/paddle/math/BaseMatrix.cu
index 6db5965789b3750f46731f157167150583130d0a..ba2b47d6cc6961a380b7db2781b4d214dea829db 100644
--- a/paddle/math/BaseMatrix.cu
+++ b/paddle/math/BaseMatrix.cu
@@ -442,7 +442,8 @@ DEFINE_MATRIX_UNARY_PARAMETER_OP(Clip, TWO_PARAMETER,
 template<class T>
 void BaseMatrixT<T>::clip(T p1, T p2) { applyUnary(unary::Clip<T>(p1, p2)); }
 
-DEFINE_MATRIX_BINARY_PARAMETER_OP(ClipDerivative, TWO_PARAMETER, a = b < p1 ? 0 : (b > p2 ? 0 : 1));
+DEFINE_MATRIX_BINARY_PARAMETER_OP(ClipDerivative, TWO_PARAMETER,
+    a = b < p1 ? 0 : (b > p2 ? 0 : 1));
 template<class T>
 void BaseMatrixT<T>::clipDerivative(BaseMatrixT& b, T p1, T p2) {
   applyBinary(binary::ClipDerivative<T>(p1, p2), b);
diff --git a/paddle/operators/mean_op.h b/paddle/operators/mean_op.h
index a89cb422f9b296dba6eb5358043f73d00aefc5d3..e712dee6a785749e51be7b233e85dbf39c835218 100644
--- a/paddle/operators/mean_op.h
+++ b/paddle/operators/mean_op.h
@@ -47,7 +47,7 @@ public:
 
     T ig_size = (T)framework::product(IG->dims());
 
-    EigenVector<T>::Flatten(*IG).device(*(context.GetEigenDevice<Place>())) =
+    EigenVector<T>::Flatten(*IG).device(context.GetEigenDevice<Place>()) =
         EigenScalar<T>::From(*OG) / ig_size;
   }
 };
diff --git a/paddle/scripts/docker/build.sh b/paddle/scripts/docker/build.sh
index 69ae0ea2d72c199a8e17c0595693e5e0b2f79ee1..8de0e608c1f482e4553c07ff7ffd572d65a772aa 100644
--- a/paddle/scripts/docker/build.sh
+++ b/paddle/scripts/docker/build.sh
@@ -69,7 +69,7 @@ cat <<EOF
 Installing ...
 ========================================
 EOF
-make install
+make install -j `nproc`
 pip install /usr/local/opt/paddle/share/wheels/*.whl
 paddle version
 
@@ -122,7 +122,7 @@ cat <<EOF
 Generating .deb package ...
 ========================================
 EOF
-cpack -D CPACK_GENERATOR='DEB' ..
+cpack -D CPACK_GENERATOR='DEB' -j `nproc` ..
 
 
 cat <<EOF