rehash executable path

bin/steps/conda_compile

@@ -1,9 +1,16 @@
+#!/usr/bin/env bash
+
+export PATH=$BUILD_DIR/.heroku/miniconda/bin:$PATH
+
 if [ ! -d /app/.heroku/miniconda ]; then
     puts-step "Preparing Python/Miniconda Environment"
     curl -Os https://repo.continuum.io/miniconda/Miniconda-latest-Linux-x86_64.sh
     bash Miniconda-latest-Linux-x86_64.sh  -p /app/.heroku/miniconda/ -b | indent
     rm -fr Miniconda-latest-Linux-x86_64.sh
 
+    # Rehash executables in PATH.
+    hash -r
+
     conda update conda
     conda install pip --yes | indent
 fi