From 9b81da1b2db42a9a64e66fb94c326258e4af80d2 Mon Sep 17 00:00:00 2001
From: Matt McCormick <matt.mccormick@kitware.com>
Date: Mon, 4 May 2015 16:23:12 -0400
Subject: [PATCH] Use nproc to get the number of processors on the build host.

---
 Dockerfile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 082e9d9..b747ab4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,7 +32,7 @@ RUN git clone git://cmake.org/cmake.git CMake && \
 RUN mkdir CMake-build
 WORKDIR /usr/src/CMake-build
 RUN /usr/src/CMake/bootstrap \
-    --parallel=$(ls /sys/bus/cpu/devices | wc -w) \
+    --parallel=$(nproc) \
     --prefix=/usr && \
-  make -j$(ls /sys/bus/cpu/devices | wc -w) install && \
+  make -j$(nproc) install && \
   rm -rf *