diff --git a/pkgs/development/python-modules/pikepdf/default.nix b/pkgs/development/python-modules/pikepdf/default.nix
index 2b0b9bc4999a..ab78f2262445 100644
--- a/pkgs/development/python-modules/pikepdf/default.nix
+++ b/pkgs/development/python-modules/pikepdf/default.nix
@@ -2,7 +2,7 @@
 , attrs
 , buildPythonPackage
 , defusedxml
-, fetchPypi
+, fetchFromGitHub
 , hypothesis
 , isPy3k
 , jbig2dec
@@ -27,9 +27,17 @@ buildPythonPackage rec {
   version = "3.2.0";
   disabled = ! isPy3k;
 
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "a0582f00440668c07edb8403e82724961c7812c8e6c30655e34825b2645f15cd";
+  src = fetchFromGitHub {
+    owner = "pikepdf";
+    repo = "pikepdf";
+    rev = "v${version}";
+    # The content of .git_archival.txt is substituted upon tarball creation,
+    # which creates indeterminism if master no longer points to the tag.
+    # See https://github.com/jbarlow83/OCRmyPDF/issues/841
+    extraPostFetch = ''
+      rm "$out/.git_archival.txt"
+    '';
+    sha256 = "03c7ihd6rf6kdfc3cpgxy5pi6cj4zwscz8nyxmmp15fmdk3hkw4g";
   };
 
   patches = [
@@ -40,6 +48,8 @@ buildPythonPackage rec {
     })
   ];
 
+  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+
   buildInputs = [
     pybind11
     qpdf