diff --git a/pkgs/development/python-modules/schemdraw/default.nix b/pkgs/development/python-modules/schemdraw/default.nix
index 441e668f81fc..08eecb1d8a2d 100644
--- a/pkgs/development/python-modules/schemdraw/default.nix
+++ b/pkgs/development/python-modules/schemdraw/default.nix
@@ -14,8 +14,8 @@
 
 buildPythonPackage rec {
   pname = "schemdraw";
-  version = "0.18";
-  format = "pyproject";
+  version = "0.19";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
@@ -23,18 +23,18 @@ buildPythonPackage rec {
     owner = "cdelker";
     repo = pname;
     rev = version;
-    hash = "sha256-JJc3LA+fqB+2g7pPIZ8YMV921EyYpLZrHSJCYyYThZg=";
+    hash = "sha256-vqEHcazE5DNHr0FceOWLqq+RZmMK5ovHDVjy/2wbTJU=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     setuptools
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     pyparsing
   ];
 
-  passthru.optional-dependencies = {
+  optional-dependencies = {
     matplotlib = [
       matplotlib
     ];
@@ -59,6 +59,8 @@ buildPythonPackage rec {
     substituteInPlace test/test_styles.ipynb --replace "font='Times', " ""
   '';
 
+  preCheck = "rm test/test_pictorial.ipynb";   # Tries to download files
+
   pytestFlagsArray = [ "--nbval-lax" ];
 
   pythonImportsCheck = [ "schemdraw" ];
diff --git a/pkgs/development/python-modules/ziafont/default.nix b/pkgs/development/python-modules/ziafont/default.nix
index 788dda332941..d50e5fdefe17 100644
--- a/pkgs/development/python-modules/ziafont/default.nix
+++ b/pkgs/development/python-modules/ziafont/default.nix
@@ -9,9 +9,8 @@
 
 buildPythonPackage rec {
   pname = "ziafont";
-  version = "0.7";
-
-  format = "pyproject";
+  version = "0.8";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
@@ -19,10 +18,10 @@ buildPythonPackage rec {
     owner = "cdelker";
     repo = pname;
     rev = version;
-    hash = "sha256-DQEVWYOgiGSP3WlmZzEweyRa0UY7fxjjpbued+5EH5I=";
+    hash = "sha256-C+dC+mNquDuj6RfJpiEbeuGZOIXcgSrTB4XM21reBPs=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/ziamath/default.nix b/pkgs/development/python-modules/ziamath/default.nix
index c2d72a25f810..592e486edce1 100644
--- a/pkgs/development/python-modules/ziamath/default.nix
+++ b/pkgs/development/python-modules/ziamath/default.nix
@@ -11,8 +11,8 @@
 
 buildPythonPackage rec {
   pname = "ziamath";
-  version = "0.9";
-  format = "pyproject";
+  version = "0.10";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
@@ -20,14 +20,14 @@ buildPythonPackage rec {
     owner = "cdelker";
     repo = pname;
     rev = version;
-    hash = "sha256-ISd+J7R8qZ0NXdlyHMj+torzr+541UAhNCSaUH8ytSQ=";
+    hash = "sha256-Drssi+YySh4OhVYAOvgIwzeeu5dQbUUXuhwTedhUUt8=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     setuptools
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     ziafont
   ];