title: Unable to use make in alpine image
body: <p>I cant get <code>make</code> to work in alpine
  <code>make update_tools</code> works when I run it on my OSX, but when i run it in the alpine image i get the following error:
  make: *** No rule to make target 'update_tools'. Stop.
  Here is what my Dockerfile looks like now:</p>
  
  <pre><code>#Download base image Alpine-3.9  Golang 1.12 
  FROM golang:1.12-alpine3.9
  
  # Set Working Directory is /usr/app
  WORKDIR /usr/app
  
  # Install Alpine Dependencies
  RUN apk update &amp;&amp; apk upgrade &amp;&amp; apk add --update alpine-sdk &amp;&amp; \
      apk add --no-cache bash git openssh make cmake 
  
  COPY cosmos-sdk .
  
  WORKDIR /usr/app/cosmos-sdk
  
  RUN git checkout v0.33.0 &amp;&amp; \
      make update_tools &amp;&amp; \ 
      make vendor-deps &amp;&amp; \ 
      make install &amp;&amp; \
      gaiad init $(whoami) &amp;&amp; \
      rm .gaiad/config/genesis.json &amp;&amp; \
      curl https://raw.githubusercontent.com/cosmos/launch/master/genesis.json &gt; $HOME/.gaiad/config/genesis.json 
  
  #Add persistent peer to config.toml file
  RUN sed -i '' 's/persistent_peers = ""/persistent_peers = "89e4b72625c0a13d6f62e3cd9d40bfc444cbfa77@34.65.6.52:26656"/' $HOME/.gaiad/config/config.toml 
  
  #Start gaid daemon and set logging to info
  CMD ["gaiad start --log_level="*:info""]
  
  # Expose the ports
  EXPOSE 26656 26657
  </code></pre>
  
  <h2>Makefile: <a href="https://github.com/cosmos/cosmos-sdk/blob/develop/Makefile" rel="nofollow noreferrer">https://github.com/cosmos/cosmos-sdk/blob/develop/Makefile</a></h2>
  
  <p>I would appreciate any pointers on this</p>