Issue to create a Yara rule using the ssdeep fuzzy hashing technique

Question

I am trying to create a Yara rule using the ssdeep fuzzy hashing technique, I understand that my Yara rule should look like this:

import "hash"

rule SuspiciousSSDeep {
    meta:
        description = "Detects suspicious files based on ssdeep fuzzy hashing"
    strings:
        $ssdeep_hash = "ssdeep:" 
    condition:
        hash.ssdeep(0, filesize) == $ssdeep_hash
}

but when I launch may Yara rule I am getting an error "invalid field name "ssdeep""

I am using Yara 4.5 and my yara installation seems to support the hash module because when I launch this command, it is indicated as the module presents with the installation:

import "hash"

rule SuspiciousSSDeep {
    meta:
        description = "Detects suspicious files based on ssdeep fuzzy hashing"
    strings:
        $ssdeep_hash = "ssdeep:" 
    condition:
        hash.ssdeep(0, filesize) == $ssdeep_hash
}

Would you know why ssdeep is not recognized as part of the hash module ? it is true that ssdeep is not indicated in the Yara documentation https://yara.readthedocs.io/en/v3.4.0/modules/hash.html so maybe this information is wrong.

Would someone know how to use ssdeep fuzzy hashing in a Yara rule ?

I tried to find another way to implement ssdeep in a Yara rule but I couldn't find it...