diff --git a/pkgs/by-name/pr/primecount/package.nix b/pkgs/by-name/pr/primecount/package.nix
index d60d18637160..e5381b4e5ad6 100644
--- a/pkgs/by-name/pr/primecount/package.nix
+++ b/pkgs/by-name/pr/primecount/package.nix
@@ -9,13 +9,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "primecount";
-  version = "7.20";
+  version = "8.0";
 
   src = fetchFromGitHub {
     owner = "kimwalisch";
     repo = "primecount";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-rM+c1CDD75bRqvUMI8Ej02nSqkweR8+E4Wpag7mJcM4=";
+    hash = "sha256-EogWQWbAlLlhaIMZck9fzqv9XPJRbSe2zUtKU6xCZvU=";
   };
 
   outputs = [
diff --git a/pkgs/development/python-modules/primecountpy/default.nix b/pkgs/development/python-modules/primecountpy/default.nix
index 5c50b43b7352..08b2269fdf02 100644
--- a/pkgs/development/python-modules/primecountpy/default.nix
+++ b/pkgs/development/python-modules/primecountpy/default.nix
@@ -2,8 +2,10 @@
   lib,
   fetchPypi,
   buildPythonPackage,
-  primecount,
+  meson-python,
   cython,
+  pkg-config,
+  primecount,
   cysignals,
 
   # Reverse dependency
@@ -12,18 +14,24 @@
 
 buildPythonPackage rec {
   pname = "primecountpy";
-  version = "0.1.1";
-  format = "setuptools";
+  version = "0.2.1";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-yFYYF8C+hu7/xBuXtu9hfXlfcs895Z2SNNHIPX5CQDA=";
+    sha256 = "sha256-iIcGq2XMCJ+5g95GOTYN3ccouqTZh3p62LEW9kVlCzk=";
   };
 
+  build-system = [
+    meson-python
+    cython
+  ];
+
+  nativeBuildInputs = [ pkg-config ];
+
   buildInputs = [ primecount ];
 
   propagatedBuildInputs = [
-    cython
     cysignals
   ];