diff --git a/lib/sysgeneral.py b/lib/sysgeneral.py
index fdbafd0..e1d2efa 100644
--- a/lib/sysgeneral.py
+++ b/lib/sysgeneral.py
@@ -96,14 +96,28 @@ this script the next time")
                 raise Exception("Download failed.")
         return abs_file_name
 
-    def get_packages(self):
+    def get_packages(self, source_manifest):
         """Prepare remaining sources"""
+        for line in source_manifest.split("\n"):
+            line = line.strip().split(" ")
+
+            path = self.download_file(line[2], line[1], line[3])
+            self.check_file(path, line[0])
+
+    @classmethod
+    def get_source_manifest(cls):
+        """
+        Generage a source manifest for the system.
+        """
+        manifest_lines = []
+        directory = os.path.relpath(cls.cache_dir, cls.git_dir)
+
         # Find all source files
-        for file in os.listdir(self.sys_dir):
-            if os.path.isdir(os.path.join(self.sys_dir, file)):
-                sourcef = os.path.join(self.sys_dir, file, "sources")
+        for file in os.listdir(cls.sys_dir):
+            if os.path.isdir(os.path.join(cls.sys_dir, file)):
+                sourcef = os.path.join(cls.sys_dir, file, "sources")
                 if os.path.exists(sourcef):
-                    # Download sources in the source file
+                    # Read sources from the source file
                     with open(sourcef, "r", encoding="utf_8") as sources:
                         for line in sources.readlines():
                             line = line.strip().split(" ")
@@ -114,8 +128,9 @@ this script the next time")
                                 # Automatically determine file name based on URL.
                                 file_name = os.path.basename(line[0])
 
-                            path = self.download_file(line[0], self.cache_dir, file_name)
-                            self.check_file(path, line[1])
+                            manifest_lines.append(f"{line[1]} {directory} {line[0]} {file_name}")
+
+        return "\n".join(manifest_lines)
 
     def make_initramfs(self):
         """Package binary bootstrap seeds and sources into initramfs."""
diff --git a/sysa.py b/sysa.py
index f6ec005..dd709c9 100755
--- a/sysa.py
+++ b/sysa.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """System A"""
 # SPDX-License-Identifier: GPL-3.0-or-later
-# SPDX-FileCopyrightText: 2022 Dor Askayo <dor.askayo@gmail.com>
+# SPDX-FileCopyrightText: 2022-2023 Dor Askayo <dor.askayo@gmail.com>
 # SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
 # SPDX-FileCopyrightText: 2021 Melg Eight <public.melg8@gmail.com>
 # SPDX-FileCopyrightText: 2021-22 fosslinux <fosslinux@aussies.space>
@@ -78,7 +78,8 @@ class SysA(SysGeneral):
 
     def sysa(self):
         """Copy in sysa files for sysa."""
-        self.get_packages()
+        source_manifest = self.get_source_manifest()
+        self.get_packages(source_manifest)
 
         shutil.copytree(self.sys_dir, os.path.join(self.tmp_dir, 'sysa'),
                 ignore=shutil.ignore_patterns('tmp'))
diff --git a/sysc.py b/sysc.py
index b59b259..0851f25 100755
--- a/sysc.py
+++ b/sysc.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """System C"""
 # SPDX-License-Identifier: GPL-3.0-or-later
-# SPDX-FileCopyrightText: 2022 Dor Askayo <dor.askayo@gmail.com>
+# SPDX-FileCopyrightText: 2022-2023 Dor Askayo <dor.askayo@gmail.com>
 # SPDX-FileCopyrightText: 2021-22 fosslinux <fosslinux@aussies.space>
 # SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
 
@@ -70,7 +70,9 @@ class SysC(SysGeneral):
             rootfs_dir = self.tmp_dir
 
         if self.external_sources:
-            self.get_packages()
+            source_manifest = self.get_source_manifest()
+            self.get_packages(source_manifest)
+
             copytree(self.cache_dir, os.path.join(rootfs_dir, "distfiles"))
 
         # Unmount tmp/mnt if it was mounted