Bash: <app> returns a different location than expected

App search is cached. Reset entry pip

:

hash pip

      

        
        
        
      

    

Quote man bash

:

If the name is neither a shell function nor a built-in, and does not contain a forward slash, bash searches for every PATH entry for the directory containing the executable with that name. bash uses a hash table to remember the full paths to executable files (see the hash code in the SHELL BUILTIN COMMANDS section below). A full search of directories in PATH is performed only if the command is not found in the hash table.

and the entry for hash

in the same documentation:

hash [-lr] [-p filename] [-dt] [name]


For each name, the fully qualified command file name is determined by searching directories in $ PATH and remembered.

which

always looking for your path, regardless of the hash entry.