diff --git a/build/pkgs/cycler/dependencies b/build/pkgs/cycler/dependencies
index 2218ed812dd..8a158d645be 100644
--- a/build/pkgs/cycler/dependencies
+++ b/build/pkgs/cycler/dependencies
@@ -1,4 +1,4 @@
- six | $(PYTHON_TOOLCHAIN) $(PYTHON)
+ | $(PYTHON_TOOLCHAIN) $(PYTHON)
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diff --git a/build/pkgs/matplotlib/dependencies b/build/pkgs/matplotlib/dependencies
index a2592fe7c6d..f2968081f9c 100644
--- a/build/pkgs/matplotlib/dependencies
+++ b/build/pkgs/matplotlib/dependencies
@@ -1,4 +1,4 @@
- numpy freetype pillow dateutil pyparsing tornado six cycler qhull fonttools contourpy | $(PYTHON_TOOLCHAIN) kiwisolver certifi setuptools_scm_git_archive $(PYTHON)
+ numpy freetype pillow dateutil pyparsing tornado cycler qhull fonttools contourpy | $(PYTHON_TOOLCHAIN) kiwisolver certifi setuptools_scm_git_archive $(PYTHON)
 
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 All lines of this file are ignored except the first.
diff --git a/build/pkgs/traitlets/dependencies b/build/pkgs/traitlets/dependencies
index e835448bea5..6b7d279c5ab 100644
--- a/build/pkgs/traitlets/dependencies
+++ b/build/pkgs/traitlets/dependencies
@@ -1,4 +1,4 @@
- | $(PYTHON_TOOLCHAIN) ipython_genutils decorator six hatchling $(PYTHON)
+ | $(PYTHON_TOOLCHAIN) ipython_genutils decorator hatchling $(PYTHON)
 
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