trouble installing drizzlepac
As I understand it, you should not be using pip with Anaconda or you will get into a mess. Unfortunately, that's not the main issue here.
The workbook you linked has a banner at the top that mentions an initialization workbook, which is on this page. On that page it states that &quot;Users unfamiliar with Anaconda/Astroconda should see the documentation.&quot;
I am unfamiliar with Astroconda, so I went to the documentation page which lists the following requirements:

System Requirements

64-bit Intel/AMD processor (x86_64)
64-bit Linux (glibc ≥ 2.12) or Mac OS X (≥ 10.7)
BASH or ZSH as your default shell environment (T/CSH is NOT supported)


I see from your command line that you are using this on Windows. That is not listed as a supported operating system: the software is Linux/Mac only.