我想在 Ubuntu 18.04 上安装我自己的 Odoo 11 Debian 包。这是我的 debian/control 文件的“Depends”部分：
Depends:
${misc:Depends},
${python3:Depends},
adduser,
lsb-base,
node-less,
postgresql-client,
python3-dev,
build-essential,
python3-babel,
python3-dateutil,
python3-decorator,
python3-docutils,
python3-feedparser,
python3-html2text,
python3-pil,
python3-jinja2,
python3-lxml,
python3-mako,
python3-mock,
python3-passlib,
python3-psutil,
python3-psycopg2 (= 2.7.4),
python3-pydot,
python3-pyparsing,
python3-pypdf2,
python3-reportlab,
python3-requests,
python3-suds,
python3-tz,
python3-vatnumber,
python3-werkzeug,
python3-xlsxwriter,
python3-yaml,
wkhtmltopdf,
nodejs,
npm,
python3-pip,
python3-venv,
python3-wheel,
libxslt1-dev,
libzip-dev,
libldap2-dev,
libsasl2-dev,
python3-setuptools,
node-less,
postgresql-10,
nginx,
python3-xlwt,
Conflicts: tinyerp-server, openerp-server, openerp-web, openerp
Replaces: tinyerp-server, openerp-server, openerp-web, openerp
Recommends:
${python3:Recommends},
python3-pyldap,
python3-qrcode,
python3-vobject,
但是，当我尝试使用 gdebi 安装该包时，出现此错误：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading state information... Done
This package is uninstallable
Dependency is not satisfiable: python3-psycopg2 (= 2.7.4)
这是结果apt-cache policy python3-psycopg2（我有自己的依赖源本地存储库）
python3-psycopg2:
Installed: (none)
Candidate: 2.8.6-2~pgdg90+1
Version table:
2.8.6-2~pgdg90+1 500
500 http://10.3.0.70/local-repo Packages
2.7.4-1 500
500 http://id.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
500 http://10.3.0.70/local-repo Packages
我确实需要仅安装 python3-psycopg2 的 2.7.4 版本，因为 Ubuntu 18.04 不支持 2.8.6 版本。如何解决这个问题？