could not get source packages when synchronizing debian-security​ repository

[zhangdandan <zhangdandan@loongson.cn>]

Hello developers,

I used apt-mirror command to get source packages and binary packages 
from http://security.debian.org/debian-security/.
The result is that I can not get source packages, as follows,

1. mirror.list file
```
$ cat /etc/apt/mirror.list
############# config ##################
#
set base_path    /data/security/spool/apt-mirror
#
set nthreads     20
set _tilde 0
#
############# end config ##############

#deb http://ftp.us.debian.org/debian unstable main contrib non-free
#deb-src http://ftp.us.debian.org/debian unstable main contrib non-free

deb http://security.debian.org/debian-security/ stable-security main
deb-src http://security.debian.org/debian-security/ stable-security main
......
```

2. command
# apt-mirror
......
11.3 GiB will be downloaded into archive.
Downloading 568 archive files using 20 threads...
Begin time: Thu Nov  6 14:14:15 2025
[20]... [19]... [18]... [17]... [16]... [15]... [14]... [13]... [12]... 
[11]... [10]... [9]... [8]... [7]... [6]... [5]... ^[[B[4]... [3]... 
[2]... [1]... [0]...
​
3. result (I can not get source packages)
$ ls 
/data/security/spool/apt-mirror/mirror/security.debian.org/debian-security/pool/updates/main/
a  b  c  d  e  f  g  h  i  j  l  libc  libj  libx  n  o  p  q  r s  t  
u  v  w  x
​$ ls 
/data/security/spool/apt-mirror/mirror/security.debian.org/debian-security/pool/updates/main/a/aide/aide
aide_0.19.1-2+deb13u1_amd64.deb aide-common_0.19.1-2+deb13u1_all.deb 
aide-dynamic_0.19.1-2+deb13u1_all.deb
$ ls 
/data/security/spool/apt-mirror/mirror/security.debian.org/debian-security/pool/updates/main/w/webkit2gtk/
gir1.2-javascriptcoregtk-4.1_2.50.1-1~deb13u1_amd64.deb 
libjavascriptcoregtk-4.0-bin_2.50.1-1~deb13u1_all.deb 
libjavascriptcoregtk-6.0-dev_2.50.1-1~deb13u1_amd64.deb
gir1.2-javascriptcoregtk-6.0_2.50.1-1~deb13u1_amd64.deb 
libjavascriptcoregtk-4.1-0_2.50.1-1~deb13u1_amd64.deb 
libjavascriptcoregtk-bin_2.50.1-1~deb13u1_amd64.deb
gir1.2-webkit2-4.1_2.50.1-1~deb13u1_amd64.deb 
libjavascriptcoregtk-4.1-dev_2.50.1-1~deb13u1_amd64.deb 
libwebkit2gtk-4.0-doc_2.50.1-1~deb13u1_all.deb
gir1.2-webkit-6.0_2.50.1-1~deb13u1_amd64.deb 
libjavascriptcoregtk-6.0-1_2.50.1-1~deb13u1_amd64.deb 
libwebkit2gtk-4.1-0_2.50.1-1~deb13u1_amd64.deb

I wolud like to get security mirror including  source packages and 
binary packages from http://security.debian.org stable-security.
Could you provide some guidance or other methods for synchronizing 
debian-security​ repository? Thank you.


Best regards,
Dandan Zhang