diff --git a/piker/tsp/_anal.py b/piker/tsp/_anal.py
index ea78c46a..42c3aa6c 100644
--- a/piker/tsp/_anal.py
+++ b/piker/tsp/_anal.py
@@ -517,7 +517,7 @@ def with_dts(
 
     '''
     return df.with_columns([
-        pl.col(time_col).shift(1).suffix('_prev'),
+        pl.col(time_col).shift(1).name.suffix('_prev'),
         pl.col(time_col).diff().alias('s_diff'),
         pl.from_epoch(pl.col(time_col)).alias('dt'),
     ]).with_columns([
@@ -623,7 +623,7 @@ def detect_vlm_gaps(
 
 ) -> pl.DataFrame:
 
-    vnull: pl.DataFrame = w_dts.filter(
+    vnull: pl.DataFrame = df.filter(
         pl.col(col) == 0
     )
     return vnull
diff --git a/pyproject.toml b/pyproject.toml
index 7a6de4e7..14a0a6b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,8 @@ dependencies = [
     "ib-insync >=0.9.86, <0.10.0",
     "numba >=0.59.0, <0.60.0",
     "numpy >=1.25, <2.0",
-    "polars >=0.18.13, <0.19.0",
+    "polars >=0.20.6",
+    "polars-fuzzy-match>=0.1.5",
     "pygments >=2.16.1, <3.0.0",
     "rich >=13.5.2, <14.0.0",
     "tomli >=2.0.1, <3.0.0",
@@ -75,6 +76,7 @@ dependencies = [
     "tractor",
     "asyncvnc",
     "tomlkit",
+    "trio-typing>=0.10.0",
 ]
 
 [project.optional-dependencies]
@@ -130,4 +132,4 @@ pyqtgraph = { git = "https://github.com/pikers/pyqtgraph.git" }
 asyncvnc = { git = "https://github.com/pikers/asyncvnc.git", branch = "main" }
 tomlkit = { git = "https://github.com/pikers/tomlkit.git", branch ="piker_pin" }
 msgspec = { git = "https://github.com/jcrist/msgspec.git" }
-tractor = { path = "../tractor", editable = true }
+tractor = { git = "https://pikers.dev/goodboy/tractor", branch = "aio_abandons" }