debug cxx-compiler version

Author: anutosh491

Diff for: environment-dev.yml

@@ -5,7 +5,7 @@ dependencies:
   # Build dependencies
   - make
   - cmake
-  - cxx-compiler>=1.8.0
+  - cxx-compiler=1.7.0
   # Host dependencies
   - xeus>=5.0.0
   - xeus-zmq>=3.0,<4.0
@@ -21,4 +21,4 @@ dependencies:
   - nbformat
   - nbval
   - pytest-rerunfailures
-  - doctest
+  - doctest