update travis build (pkg-config)

.travis.yml

@@ -18,14 +18,13 @@ addons:
 before_install:
     - wget http://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
     - chmod +x miniconda.sh
-    - "./miniconda.sh -b"
+    - "./miniconda.sh -b -p ~/miniconda3"
     - export CONDA_PATH=$HOME/miniconda3
     - export PATH=$CONDA_PATH/bin:$PATH
     - conda update --yes conda
-    - conda install --yes gcc automake pkgconfig viennarna>=2.4.8 boost=1.61.* -c conda-forge -c bioconda
-    - export CONDA_LIB_PATH=$CONDA_PATH/lib
-    #    - ls $CONDA_LIB_PATH
-    #    - ls $CONDA_PATH/include
+    - conda create -n build_env --yes gcc automake pkg-config viennarna>=2.4.8 boost=1.61.* -c conda-forge -c bioconda
+    - source activate build_env
+    - export CONDA_LIB_PATH=$CONDA_PATH/envs/build_env/lib
     - export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CONDA_LIB_PATH
 
 script: