diff -u obnam-1.22/obnamlib/encryption.py.orig obnam-1.22/obnamlib/encryption.py
--- obnam-1.22/obnamlib/encryption.py.orig	2017-07-21 17:57:59.323647221 +0200
+++ obnam-1.22/obnamlib/encryption.py	2017-07-21 17:58:35.817783095 +0200
@@ -122,7 +122,7 @@
         env['GNUPGHOME'] = gpghome
         tracing.trace('gpghome=%s' % gpghome)
 
-    argv = ['gpg', '-q', '--batch', '--no-textmode'] + args
+    argv = ['gpg2', '-q', '--batch', '--no-textmode'] + args
     tracing.trace('argv=%s', repr(argv))
     p = subprocess.Popen(argv, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                          stderr=subprocess.PIPE, env=env)

Diff finished.  Fri Jul 21 17:58:49 2017