diff --git a/src/projspec/proj/pixi.py b/src/projspec/proj/pixi.py
index 08d9084..8a37e49 100644
--- a/src/projspec/proj/pixi.py
+++ b/src/projspec/proj/pixi.py
@@ -60,7 +60,7 @@ class Pixi(ProjectSpec):
     # https://pixi.sh/dev/reference/pixi_manifest/
 
     def match(self) -> bool:
-        meta = self.proj.pyproject.get("tools", {}).get("pixi", {})
+        meta = self.proj.pyproject.get("tool", {}).get("pixi", {})
         return bool(meta) or "pixi.toml" in self.proj.basenames
 
     def parse(self) -> None:
@@ -68,7 +68,7 @@ def parse(self) -> None:
         from projspec.artifact.python_env import CondaEnv, LockFile
         from projspec.content.environment import Environment, Precision, Stack
 
-        meta = self.proj.pyproject.get("tools", {}).get("pixi", {})
+        meta = self.proj.pyproject.get("tool", {}).get("pixi", {})
         if "pixi.toml" in self.proj.basenames:
             try:
                 with self.proj.fs.open(self.proj.basenames["pixi.toml"], "rb") as f:
diff --git a/src/projspec/proj/uv.py b/src/projspec/proj/uv.py
index 10020f6..a5be467 100644
--- a/src/projspec/proj/uv.py
+++ b/src/projspec/proj/uv.py
@@ -113,7 +113,7 @@ def parse(self):
                     stack=Stack.PIP,
                     precision=Precision.SPEC,
                     packages=packages,
-                    channels=deep_get(meta, "tools.uv.index", default=[]),
+                    channels=deep_get(meta, "tool.uv.index", default=[]),
                 )
                 found = True
             except (KeyError, ValueError):
@@ -160,7 +160,7 @@ def match(self):
             self.proj.basenames
         ):
             return True
-        if "uv" in self.proj.pyproject.get("tools", {}):
+        if "uv" in self.proj.pyproject.get("tool", {}):
             # even if it is present, uv can be explicitly directed to ignore the
             # project https://docs.astral.sh/uv/reference/settings/#managed
             return self.proj.pyproject["tool"]["uv"].get("managed", True)
@@ -183,7 +183,7 @@ def parse(self):
 
         super().parse()
         meta = self.proj.pyproject
-        conf = meta.get("tools", {}).get("uv", {})
+        conf = meta.get("tool", {}).get("uv", {})
         try:
             with self.get_file("uv.toml") as f:
                 conf2 = toml.load(f, decoder=PickleableTomlDecoder())