diff --git a/repo.py b/repo.py
--- a/repo.py
+++ b/repo.py
@@ -2,14 +2,11 @@
 
 import argparse
 import glob
-import hashlib
 import os.path
 import pyalpm
 import requests
 import sys
 import tarfile
-import zstandard
-from contextlib import contextmanager
 from srcinfo.parse import parse_srcinfo
 
 
@@ -141,66 +138,6 @@
             or pkgname.endswith('-svn')
 
 
-# https://github.com/indygreg/python-zstandard/issues/64#issuecomment-647811500
-@contextmanager
-def open_tar_zst(path_tar_zst):
-    """Decompress and open a .tar.zst file"""
-    with open(path_tar_zst, 'rb') as fh:
-        dctx = zstandard.ZstdDecompressor()
-        with dctx.stream_reader(fh) as stream:
-            yield tarfile.TarFile(fileobj=stream)
-
-
-def compare_with_sources_pkgver(repo, srcpath, skip_vcs_suffix=False):
-    source_packages = set([])
-
-    for srcinfo_file in glob.glob(os.path.join(srcpath,
-                                               '*/.SRCINFO')):
-        with open(srcinfo_file) as f:
-            result, errors = parse_srcinfo(f.read())
-            pkgver = '{0}-{1}'.format(result['pkgver'], result['pkgrel'])
-            if result.get('epoch', None) is not None:
-                pkgver = '{0}:{1}'.format(result['epoch'], pkgver)
-
-                for pkgname in result['packages']:
-                    if not skip_vcs_suffix or not has_vcs_suffix(pkgname):
-                        source_packages.add(Package(pkgname, pkgver))
-
-    for pkg in sorted(source_packages - list_packages(repo)):
-        yield pkg
-
-
-def compare_with_sources_sha256sum(repo, srcpath):
-    pkgbuild_sha256sums = {}
-
-    for srcinfo_file in glob.glob(os.path.join(srcpath,
-                                               '*/.SRCINFO')):
-        with open(srcinfo_file) as f:
-            result, errors = parse_srcinfo(f.read())
-            with open(srcinfo_file.replace('.SRCINFO', 'PKGBUILD'),
-                      'rb') as p:
-                h = hashlib.sha256()
-                h.update(p.read())
-
-            for pkgname in result['packages']:
-                pkgbuild_sha256sums[pkgname] = h.hexdigest()
-
-    for pkg in list_packages(repo):
-        expected_pkgbuild_sha256sum = pkgbuild_sha256sums[pkg.name]
-
-        if pkg.filename.endswith('.zst'):
-            with open_tar_zst(pkg.filename) as tar:
-                for tarinfo in tar:
-                    if tarinfo.name[-5:] == '/.BUILDINFO':
-                        contents = tar.extractfile(tarinfo)
-                        for line in contents.readlines():
-                            if line.startswith('pkgbuild_sha256sum'):
-                                _, v = line.split('=', 1)
-
-                                if v.strip() != expected_pkgbuild_sha256sum:
-                                    yield pkg
-
-
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description="Arch repository helper")
     group = parser.add_mutually_exclusive_group(required=True)
@@ -224,9 +161,6 @@
                         help="do not include version in package lists")
     parser.add_argument('--srcpath', type=str,
                         help="path to package source directory")
-    parser.add_argument('--compare-pkgbuild', action='store_true',
-                        help="compare PKGBUILD instead of package version "
-                             "when using --compare-with-sources")
     parser.add_argument('--skip-vcs-suffix', action='store_true',
                         help="skip packages that use a common VCS suffix "
                              "(e.g. -git) when using --compare-with-sources")
@@ -255,10 +189,19 @@
             print("fatal: a --srcpath must be provided.", file=sys.stderr)
             sys.exit(1)
 
-        if args.compare_pkgbuild:
-            for pkg in compare_with_sources_sha256sum(args.repo, args.srcpath):
-                print_pkg(pkg, args.pkgonly)
-        else:
-            for pkg in compare_with_sources_pkgver(args.repo, args.srcpath,
-                                                   args.skip_vcs_suffix):
-                print_pkg(pkg, args.pkgonly)
+        source_packages = set([])
+
+        for srcinfo_file in glob.glob(os.path.join(args.srcpath,
+                                                   '*/.SRCINFO')):
+            with open(srcinfo_file) as f:
+                result, errors = parse_srcinfo(f.read())
+                pkgver = '{0}-{1}'.format(result['pkgver'], result['pkgrel'])
+                if result.get('epoch', None) is not None:
+                    pkgver = '{0}:{1}'.format(result['epoch'], pkgver)
+
+                for pkgname in result['packages']:
+                    if not args.skip_vcs_suffix or not has_vcs_suffix(pkgname):
+                        source_packages.add(Package(pkgname, pkgver))
+
+        for pkg in sorted(source_packages - list_packages(args.repo)):
+            print_pkg(pkg, args.pkgonly)