Dependencies not installed for python <= 3.11 after changing requires-python

[blueraft]

This came up originally in the discord, but here's an MRE for this issue.

[project]
name = "mre"
version = "0.1.0"
description = "Add your description here"
readme = "README.md"
requires-python = ">=3.12"
dependencies = [
    "beautifulsoup4>=4.12.3",
    "httpx>=0.27.2",
    "lxml>=5.3.0",
    "pydantic>=2.9.2",
    "strenum>=0.4.15 ; python_full_version < '3.11'",
    "torf>=4.2.7",
]

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

Running uv sync and uv tree gives the expected results here.

❯ uv sync
Using Python 3.12.1
Creating virtual environment at: .venv
Resolved 17 packages in 14ms
Installed 17 packages in 16ms
 + annotated-types==0.7.0
 + anyio==4.6.0
 + beautifulsoup4==4.12.3
 + certifi==2024.8.30
 + flatbencode==0.2.1
 + h11==0.14.0
 + httpcore==1.0.5
 + httpx==0.27.2
 + idna==3.10
 + lxml==5.3.0
 + mre==0.1.0 (from file:///Users/ahmedilyas/temp/mre)
 + pydantic==2.9.2
 + pydantic-core==2.23.4
 + sniffio==1.3.1
 + soupsieve==2.6
 + torf==4.2.7
 + typing-extensions==4.12.2
❯ uv tree
Resolved 17 packages in 0.32ms
mre v0.1.0
├── beautifulsoup4 v4.12.3
│   └── soupsieve v2.6
├── httpx v0.27.2
│   ├── anyio v4.6.0
│   │   ├── idna v3.10
│   │   └── sniffio v1.3.1
│   ├── certifi v2024.8.30
│   ├── httpcore v1.0.5
│   │   ├── certifi v2024.8.30
│   │   └── h11 v0.14.0
│   ├── idna v3.10
│   └── sniffio v1.3.1
├── lxml v5.3.0
├── pydantic v2.9.2
│   ├── annotated-types v0.7.0
│   ├── pydantic-core v2.23.4
│   │   └── typing-extensions v4.12.2
│   └── typing-extensions v4.12.2
└── torf v4.2.7
    └── flatbencode v0.2.1

But if I change the requires-python >= 3.10, uv sync doesn't install any of the dependencies for python <= 3.11.

[project]
name = "mre"
version = "0.1.0"
description = "Add your description here"
readme = "README.md"
requires-python = ">=3.10"
dependencies = [
    "beautifulsoup4>=4.12.3",
    "httpx>=0.27.2",
    "lxml>=5.3.0",
    "pydantic>=2.9.2",
    "strenum>=0.4.15 ; python_full_version < '3.11'",
    "torf>=4.2.7",
]

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

❯ uv sync -p 3.10
Using Python 3.10.14
Removed virtual environment at: .venv
Creating virtual environment at: .venv
Resolved 17 packages in 37ms
   Built mre @ file:///Users/ahmedilyas/temp/mre
Prepared 1 package in 222ms
Installed 1 package in 0.82ms
 + mre==0.1.0 (from file:///Users/ahmedilyas/temp/mre)
❯ uv tree
Resolved 17 packages in 0.47ms
mre v0.1.0

diff --git a/pyproject.toml b/pyproject.toml
index 256c85f..ca65138 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "mre"
 version = "0.1.0"
 description = "Add your description here"
 readme = "README.md"
-requires-python = ">=3.12"
+requires-python = ">=3.10"
 dependencies = [
     "beautifulsoup4>=4.12.3",
     "httpx>=0.27.2",
diff --git a/uv.lock b/uv.lock
index 9ec331f..683ae0f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,7 +1,7 @@
 version = 1
-requires-python = ">=3.12"
+requires-python = ">=3.10"
 resolution-markers = [
-    "python_full_version < '3.13'",
+    "python_full_version == '3.12.*'",
     "python_full_version >= '3.13'",
 ]

This gets fixed by deleting the lock file and re-locking, so I'm assuming it's a bug there.

[charliermarsh]

Thanks, will take a look!