pipenv install -r requirements.txt not respecting sys_platform

Issue description

sys_platform not working in requirements.txt. It is ignoring the sys_platform flag and putting packages in regardless of platform.

Expected result

python-magic-bin; sys_platform == 'win32' should produce a pipfile that looks something like python-magic-bin = {version = "*", markers = "sys_platform == 'win32'"}

Actual result

Pipfile shows python-magic-bin = "*"

### Steps to replicate
file requirements.txt 
---
-r requirements-compliance.txt
---

file requirements-compliance.txt
---
python-magic-bin; sys_platform == 'win32'
---

command
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pipenv install -r requirements.txt
---

$ pipenv --support

Pipenv version: `'2023.3.20'` Pipenv location: `'/pyenv/versions/3.11.5/lib/python3.11/site-packages/pipenv'` Python location: `'/pyenv/versions/3.11.5/bin/python3.11'` OS Name: `'posix'` User pip version: `'23.0.1'` user Python installations found: - `3.11.5`: `/pyenv/versions/3.11.5/bin/python3` - `3.11.5`: `/pyenv/versions/3.11.5/bin/python` - `3.11.5`: `/pyenv/versions/3.11.5/bin/python3` - `3.10.12`: `/usr/bin/python3` - `3.10.12`: `/bin/python3` - `3.7.17`: `/pyenv/versions/3.7.17/bin/python3.7` PEP 508 Information: ``` {'implementation_name': 'cpython', 'implementation_version': '3.11.5', 'os_name': 'posix', 'platform_machine': 'x86_64', 'platform_python_implementation': 'CPython', 'platform_release': '6.5.0-21-generic', 'platform_system': 'Linux', 'platform_version': '#21~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Feb 9 ' '13:32:52 UTC 2', 'python_full_version': '3.11.5', 'python_version': '3.11', 'sys_platform': 'linux'} ``` System environment variables: - `SHELL` - `SESSION_MANAGER` - `QT_ACCESSIBILITY` - `PIPENV_VENV_IN_PROJECT` - `COLORTERM` - `PYENV_SHELL` - `XDG_CONFIG_DIRS` - `SSH_AGENT_LAUNCHER` - `XDG_MENU_PREFIX` - `TERM_PROGRAM_VERSION` - `GNOME_DESKTOP_SESSION_ID` - `GNOME_SHELL_SESSION_MODE` - `SSH_AUTH_SOCK` - `XMODIFIERS` - `DESKTOP_SESSION` - `NO_AT_BRIDGE` - `EDITOR` - `GTK_MODULES` - `PWD` - `KRB5CCNAME` - `XDG_SESSION_DESKTOP` - `LOGNAME` - `XDG_SESSION_TYPE` - `SYSTEMD_EXEC_PID` - `XAUTHORITY` - `VSCODE_GIT_ASKPASS_NODE` - `HOME` - `USERNAME` - `IM_CONFIG_PHASE` - `LANG` - `LS_COLORS` - `XDG_CURRENT_DESKTOP` - `VTE_VERSION` - `WAYLAND_DISPLAY` - `GIT_ASKPASS` - `GNOME_TERMINAL_SCREEN` - `CHROME_DESKTOP` - `VSCODE_GIT_ASKPASS_EXTRA_ARGS` - `GNOME_SETUP_DISPLAY` - `LESSCLOSE` - `XDG_SESSION_CLASS` - `TERM` - `LESSOPEN` - `USER` - `VSCODE_GIT_IPC_HANDLE` - `GNOME_TERMINAL_SERVICE` - `DISPLAY` - `SHLVL` - `QT_IM_MODULE` - `XDG_RUNTIME_DIR` - `PYENV_ROOT` - `VSCODE_GIT_ASKPASS_MAIN` - `XDG_DATA_DIRS` - `GDK_BACKEND` - `PATH` - `GDMSESSION` - `ORIGINAL_XDG_CURRENT_DESKTOP` - `DBUS_SESSION_BUS_ADDRESS` - `PIPENV_TEST_INDEX` - `OLDPWD` - `GOPATH` - `TERM_PROGRAM` - `_` - `PIP_DISABLE_PIP_VERSION_CHECK` - `PIP_PYTHON_PATH` - `PYTHONDONTWRITEBYTECODE` - `PYTHONFINDER_IGNORE_UNSUPPORTED` Pipenv–specific environment variables: - `PIPENV_VENV_IN_PROJECT`: `1` - `PIPENV_TEST_INDEX`: `https://pypi.firstrf.com/simple` Debug–specific environment variables: - `PATH`: `/pyenv/versions/3.11.5/bin:/pyenv/shims:/pyenv/bin:/home/mkelley/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin:/usr/local/go/bin:/home/mkelley/go/bin:/home/mkelley/.local/bin:/usr/local/go/bin:/home/mkelley/go/bin:/home/mkelley/.local/bin` - `SHELL`: `/bin/bash` - `EDITOR`: `/usr/bin/vim` - `LANG`: `en_US.UTF-8` - `PWD`: `/home/mkelley/Desktop/piperror` --------------------------- Contents of `Pipfile` ('/home/mkelley/Desktop/piperror/Pipfile'): ```toml [[source]] url = "https://pypi.firstrf.com/simple" verify_ssl = true name = "pip_conf_index_global" [packages] python-magic-bin = "*" [dev-packages] [requires] python_version = "3.7" ```

pypa / pipenv