Remove JULIA_HOME env var for julia 1.0+

repo2docker/buildpacks/julia/julia_project.py

@@ -49,7 +49,7 @@ class JuliaProjectTomlBuildPack(PythonBuildPack):
             a string of the environment setting:
             - `JULIA_PATH`: base path where all Julia Binaries and libraries
                 will be installed
-            - `JULIA_HOME`: path where all Julia Binaries will be installed
+            - `JULIA_BINDIR`: path where all Julia Binaries will be installed
             - `JULIA_PKGDIR`: path where all Julia libraries will be installed
             - `JULIA_DEPOT_PATH`: path where Julia libraries are installed.
                                   Similar to JULIA_PKGDIR, used in 1.0.
@@ -62,10 +62,9 @@ class JuliaProjectTomlBuildPack(PythonBuildPack):
         """
         return super().get_build_env() + [
             ('JULIA_PATH', '${APP_BASE}/julia'),
-            ('JULIA_HOME', '${JULIA_PATH}/bin'),  # julia <= 0.6
-            ('JULIA_BINDIR', '${JULIA_HOME}'),  # julia >= 0.7
+            ('JULIA_BINDIR', '${JULIA_PATH}/bin'),
             ('JULIA_PKGDIR', '${JULIA_PATH}/pkg'),
-            ('JULIA_DEPOT_PATH', '${JULIA_PKGDIR}'), # julia >= 0.7
+            ('JULIA_DEPOT_PATH', '${JULIA_PKGDIR}'),
             ('JULIA_VERSION', self.julia_version),
             ('JUPYTER', '${NB_PYTHON_PREFIX}/bin/jupyter')
         ]
@@ -78,7 +77,7 @@ class JuliaProjectTomlBuildPack(PythonBuildPack):
              executable is added to the list.
 
         """
-        return super().get_path() + ['${JULIA_HOME}']
+        return super().get_path() + ['${JULIA_BINDIR}']
 
     def get_build_scripts(self):
         """