Attempt conan install.

cmake/python.cmake

@@ -22,5 +22,16 @@ execute_process(
 if(CONAN_STATUS EQUAL 0)
   message(STATUS "Have conan.")
 else()
-  message(WARNING "conan not working!! This will almost certainly cause problems down the line.")
+  execute_process(
+      COMMAND "${Python_EXECUTABLE}" -m pip install --user --upgrade conan
+    )
+  execute_process(
+      COMMAND "conan" --version
+      RESULT_VARIABLE CONAN_STATUS
+    )
+  if(CONAN_STATUS EQUAL 0)
+    message(STATUS "Installed conan.")
+  else()
+    message(WARNING "conan not working!! This will almost certainly cause problems down the line.")
+  endif()
 endif()