title: Can't install libmysqlclient-dev package when building dockerfile with ubuntu
body: <p>I have the following content on my Dockerfile:</p>
  
  <pre><code>FROM ubuntu:latest
  
  RUN apt-get update
  RUN apt-get install -y python-pip libmysqlclient-dev
  </code></pre>
  
  <p>And I got this output:</p>
  
  <pre><code>Step 4 : RUN apt-get install -y python-pip libmysqlclient-dev
   ---&gt; Running in 2fb54b3107d4
  Reading package lists...
  Building dependency tree...
  Reading state information...
  E: Unable to locate package libmysqlclient-dev 
  The command '/bin/sh -c apt-get install -y python-pip libmysqlclient-dev' returned a non-zero code: 100
  </code></pre>
  
  <p>The weird thing is that if I run the same thing using <code>docker run</code> over the same image, the command works fine:</p>
  
  <pre><code>$ docker run -it --rm ubuntu bash
  root@5f4d0083bd31:/# apt-get update &amp;&amp; apt-get install libmysqlclient-dev
  Get:1 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
  Get:2 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
  Get:3 http://archive.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
  Get:4 http://archive.ubuntu.com/ubuntu xenial/main Sources [1103 kB]
  Get:5 http://archive.ubuntu.com/ubuntu xenial/restricted Sources [5179 B]                                                                                        
  Get:6 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9802 kB]                                                                                         
  Get:7 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB]                                                                                      
  Get:8 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB]                                                                                
  Get:9 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [9827 kB]                                                                                  
  Get:10 http://archive.ubuntu.com/ubuntu xenial-updates/main Sources [261 kB]                                                                                     
  Get:11 http://archive.ubuntu.com/ubuntu xenial-updates/restricted Sources [1872 B]                                                                               
  Get:12 http://archive.ubuntu.com/ubuntu xenial-updates/universe Sources [137 kB]                                                                                 
  Get:13 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [548 kB]                                                                              
  Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [11.7 kB]                                                                       
  Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [459 kB]                                                                          
  Get:16 http://archive.ubuntu.com/ubuntu xenial-security/main Sources [60.7 kB]                                                                                   
  Get:17 http://archive.ubuntu.com/ubuntu xenial-security/restricted Sources [1872 B]                                                                              
  Get:18 http://archive.ubuntu.com/ubuntu xenial-security/universe Sources [15.8 kB]                                                                               
  Get:19 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages [225 kB]                                                                             
  Get:20 http://archive.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [11.7 kB]                                                                      
  Get:21 http://archive.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [76.9 kB]                                                                        
  Fetched 24.6 MB in 1min 26s (284 kB/s)                                                                                                                           
  Reading package lists... Done
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following additional packages will be installed:
    libc-dev-bin libc6 libc6-dev libmysqlclient20 linux-libc-dev manpages manpages-dev mysql-common zlib1g-dev
  Suggested packages:
    glibc-doc man-browser
  The following NEW packages will be installed:
    libc-dev-bin libc6-dev libmysqlclient-dev libmysqlclient20 linux-libc-dev manpages manpages-dev mysql-common zlib1g-dev
  The following packages will be upgraded:
    libc6
  1 upgraded, 9 newly installed, 0 to remove and 17 not upgraded.
  Need to get 10.9 MB of archives.
  After this operation, 35.3 MB of additional disk space will be used.
  Do you want to continue? [Y/n]
  </code></pre>
  
  <p>What could be wrong when using Dockerfile?</p>
  
  <p>Thanks</p>