gnutls: patch failure

[mf2k (Frank Schima)]

$ port outdated 
The following installed ports are outdated:
gnutls                         3.6.13_1 < 3.6.14_0       

$ sudo port upgrade outdated 
Warning: cltversion: The Command Line Tools are installed, but MacPorts cannot determine the version.
Warning: cltversion: For a possible fix, please see: https://trac.macports.org/wiki/ProblemHotlist#reinstall-clt
--->  Computing dependencies for gnutls
--->  Fetching archive for gnutls
--->  Attempting to fetch gnutls-3.6.14_0+doc.darwin_19.x86_64.tbz2 from http://aus.us.packages.macports.org/macports/packages/gnutls
--->  Attempting to fetch gnutls-3.6.14_0+doc.darwin_19.x86_64.tbz2 from https://ywg.ca.packages.macports.org/mirror/macports/packages/gnutls
--->  Attempting to fetch gnutls-3.6.14_0+doc.darwin_19.x86_64.tbz2 from https://packages.macports.org/gnutls
--->  Fetching distfiles for gnutls
--->  Verifying checksums for gnutls
--->  Extracting gnutls
--->  Applying patches to gnutls
Error: Failed to patch gnutls: command execution failed