attempting to follow conan docs

.travis.yml

@@ -1,4 +1,5 @@
-language: cpp
+language: python
+python: "3.8"
 dist: "trusty"
 sudo: required
 os: linux
@@ -14,20 +15,17 @@ before_install:
   - wget https://cmake.org/files/v3.15/cmake-3.15.0-Linux-x86_64.sh
   - chmod +x cmake-3.15.0-Linux-x86_64.sh
   - ./cmake-3.15.0-Linux-x86_64.sh --prefix=$HOME/usr --exclude-subdir --skip-license
-  - sudo apt-get update
-  - sudo apt-get install python3.8 python3.8-pip python3.8-setuptools
-  - sudo pip3 install --upgrade pip
 
 install:
-  - pip3 install conan
-  - conan user
+  - pip install conan
 
   # (fake) install dependencies (usually involves wget, configure, make, ...)
 # install into cache folder (build binaries+headers only, no sources and do NOT build there)
 # - mkdir -p $HOME/.cache
 # - touch $HOME/.cache/mydependency.so
 
 script:
+    - conan install .
     - conan create . user/channel
     - chmod +x build.sh 
     - ./build.sh