diff --git a/fimfarchive/commands/__init__.py b/fimfarchive/commands/__init__.py
index 00ccc3c..47e813d 100644
--- a/fimfarchive/commands/__init__.py
+++ b/fimfarchive/commands/__init__.py
@@ -5,7 +5,7 @@ Command module.
 
 #
 # Fimfarchive, preserves stories from Fimfiction.
-# Copyright (C) 2015  Joakim Soderlund
+# Copyright (C) 2020  Joakim Soderlund
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -23,6 +23,7 @@ Command module.
 
 
 from .base import Command
+from .build import BuildCommand
 from .root import RootCommand
 from .update import UpdateCommand
 
@@ -30,5 +31,6 @@ from .update import UpdateCommand
 __all__ = (
     'Command',
     'RootCommand',
+    'BuildCommand',
     'UpdateCommand',
 )
diff --git a/fimfarchive/commands/build.py b/fimfarchive/commands/build.py
new file mode 100644
index 0000000..c913355
--- /dev/null
+++ b/fimfarchive/commands/build.py
@@ -0,0 +1,119 @@
+"""
+Build command.
+"""
+
+
+#
+# Fimfarchive, preserves stories from Fimfiction.
+# Copyright (C) 2020  Joakim Soderlund
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+
+from argparse import ArgumentParser, Namespace, FileType
+
+from fimfarchive.fetchers import DirectoryFetcher, FimfarchiveFetcher
+from fimfarchive.flavors import DataFormat
+from fimfarchive.tasks import BuildTask
+from fimfarchive.utils import tqdm
+
+from .base import Command
+
+
+__all__ = (
+    'BuildCommand',
+)
+
+
+class BuildCommand(Command):
+    """
+    Builds a new Fimfarchive release.
+    """
+
+    @property
+    def parser(self) -> ArgumentParser:
+        """
+        Returns a command line arguments parser.
+        """
+        parser = ArgumentParser(
+            prog='',
+            description=self.__doc__,
+        )
+
+        parser.add_argument(
+            '--archive',
+            help="previous version of the archive",
+            type=FileType('rb'),
+            required=True,
+            metavar='PATH',
+        )
+
+        parser.add_argument(
+            '--output',
+            help="directory for the output archive",
+            default='worktree/build',
+        )
+
+        parser.add_argument(
+            '--meta',
+            help="directory to fetch meta from",
+            default='worktree/update/meta',
+        )
+
+        parser.add_argument(
+            '--data',
+            help="directory to fetch data from",
+            default='worktree/render/epub',
+        )
+
+        parser.add_argument(
+            '--extras',
+            help="directory to fetch extras from",
+            default='worktree/extras',
+        )
+
+        return parser
+
+    def configure(self, opts: Namespace) -> BuildTask:
+        """
+        Returns a configured task instance.
+
+        Args:
+            opts: Parsed command line arguments.
+        """
+        fimfarchive = FimfarchiveFetcher(
+            source=opts.archive,
+        )
+
+        directory = DirectoryFetcher(
+            meta_path=opts.meta,
+            data_path=opts.data,
+            flavors=[DataFormat.EPUB],
+        )
+
+        return BuildTask(
+            output=opts.output,
+            upcoming=tqdm(directory),
+            previous=fimfarchive,
+            extras=opts.extras,
+        )
+
+    def __call__(self, *args):
+        opts = self.parser.parse_args(args)
+        task = self.configure(opts)
+
+        task.run()
+
+        return 0
diff --git a/fimfarchive/commands/root.py b/fimfarchive/commands/root.py
index b5adcc9..cf92524 100644
--- a/fimfarchive/commands/root.py
+++ b/fimfarchive/commands/root.py
@@ -5,7 +5,7 @@ Root command.
 
 #
 # Fimfarchive, preserves stories from Fimfiction.
-# Copyright (C) 2015  Joakim Soderlund
+# Copyright (C) 2020  Joakim Soderlund
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -25,6 +25,7 @@ Root command.
 from typing import Dict, Type
 
 from .base import Command
+from .build import BuildCommand
 from .update import UpdateCommand
 
 
@@ -38,6 +39,7 @@ class RootCommand(Command):
     The main application command.
     """
     commands: Dict[str, Type[Command]] = {
+        'build': BuildCommand,
         'update': UpdateCommand,
     }