diff --git a/pkgs/development/python-modules/cypari/default.nix b/pkgs/development/python-modules/cypari/default.nix
new file mode 100644
index 000000000000..da8e988829ad
--- /dev/null
+++ b/pkgs/development/python-modules/cypari/default.nix
@@ -0,0 +1,80 @@
+{
+  lib,
+  python,
+  buildPythonPackage,
+  fetchFromGitHub,
+  fetchurl,
+  setuptools,
+  cython,
+  bash,
+  perl,
+  gnum4,
+  texliveBasic,
+}:
+
+let
+  pariVersion = "2.15.4";
+  gmpVersion = "6.3.0";
+
+  pariSrc = fetchurl {
+    url = "https://pari.math.u-bordeaux.fr/pub/pari/OLD/${lib.versions.majorMinor pariVersion}/pari-${pariVersion}.tar.gz";
+    hash = "sha256-w1Rb/uDG37QLd/tLurr5mdguYAabn20ovLbPAEyMXA8=";
+  };
+
+  gmpSrc = fetchurl {
+    url = "https://ftp.gnu.org/gnu/gmp/gmp-${gmpVersion}.tar.bz2";
+    hash = "sha256-rCghGnz7YJuuLiyNYFjWbI/pZDT3QM9v4uR7AA0cIMs=";
+  };
+in
+buildPythonPackage rec {
+  pname = "cypari";
+  version = "2.5.5";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "3-manifolds";
+    repo = "CyPari";
+    tag = "${version}_as_released";
+    hash = "sha256-RJ9O1KsDHmMkTCIFUrcSUkA5ijTsxmoI939QCsCib0Y=";
+  };
+
+  postPatch = ''
+    substituteInPlace ./setup.py \
+      --replace-fail "/bin/bash" "${lib.getExe bash}"
+    # final character is stripped from PARI error messages for some reason
+    substituteInPlace ./cypari/handle_error.pyx \
+      --replace-fail "not a function in function call" "not a function in function cal"
+    ln -s ${pariSrc} ${pariSrc.name}
+    ln -s ${gmpSrc} ${gmpSrc.name}
+  '';
+
+  build-system = [
+    setuptools
+    cython
+  ];
+
+  NIX_LDFLAGS = "-lc";
+
+  nativeBuildInputs = [
+    gnum4
+    perl
+    texliveBasic
+  ];
+
+  pythonImportsCheck = [ "cypari" ];
+
+  checkPhase = ''
+    runHook preCheck
+    rm -r cypari
+    ${python.interpreter} -m cypari.test
+    runHook postCheck
+  '';
+
+  meta = {
+    description = "Sage's PARI extension, modified to stand alone";
+    homepage = "https://github.com/3-manifolds/CyPari";
+    license = lib.licenses.gpl2Plus;
+    maintainers = with lib.maintainers; [ noiioiu ];
+    changelog = "https://github.com/3-manifolds/CyPari/releases/tag/${src.tag}";
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index ec0e0cba8bd0..c3c6b1c512f7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3128,6 +3128,8 @@ self: super: with self; {
 
   cynthion = callPackage ../development/python-modules/cynthion { };
 
+  cypari = callPackage ../development/python-modules/cypari { };
+
   cypari2 = callPackage ../development/python-modules/cypari2 { };
 
   cypherpunkpay = callPackage ../development/python-modules/cypherpunkpay { };