Update coverage.yml

.buildkite/coverage.yml

@@ -2,9 +2,9 @@ steps:
   - command: |
         echo "+++ :hammer: Building" && \
         /usr/bin/cmake -GNinja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_COMPILER=clang++-4.0 -DCMAKE_C_COMPILER=clang-4.0 -DWASM_ROOT=/root/opt/wasm -DOPENSSL_ROOT_DIR=/usr/include/openssl -DBUILD_MONGO_DB_PLUGIN=true -DENABLE_COVERAGE_TESTING=true -DBUILD_DOXYGEN=false && \
-        ninja
+        /usr/bin/ninja
         echo "--- :spiral_note_pad: Generating Code Coverage Report" && \
-        ninja EOS_ut_coverage
+        /usr/bin/ninja EOS_ut_coverage
     label: ":spiral_note_pad: Generate Report"
     agents:
       - "role=linux-builder"
@@ -13,4 +13,8 @@ steps:
       docker#v1.1.1:
         image: "eosio/ci:ubuntu18"
         workdir: /data/job
+        environment:
+          - BOOST_ROOT=/root/opt/boost_1_66_0
+          - OPENSSL_ROOT_DIR=/usr/include/openssl
+          - WASM_ROOT=/root/opt/wasm
     timeout: 30