How to remove duplicates from list of dicts?

I have a list of dictionaries in python as follows:

[{'category': 'software', 'name': 'irssi', 'version': '1.2.0'}, {'category': 'software', 'name': 'irssi', 'version': '1.1.2'}, {'category': 'software', 'name': 'hexchat', 'version': '2.14.2'}]

(parsing some data txt file)

What I wanna do:

If category and name are the same I wanna leave the first appearance of a package entry and remove the rest, so the final output would look like:

[{'category': 'software', 'name': 'irssi', 'version': '1.2.0'},{'category': 'software', 'name': 'hexchat', 'version': '2.14.2'}]

How should I achieve this? I tried converting the list of dictionaries to a dictionary and then iterate over it with dict.items() but with no luck.