diff --git a/pkgs/development/python-modules/pdf2image/default.nix b/pkgs/development/python-modules/pdf2image/default.nix
index d7983145cd34..b7f3f6e197f3 100644
--- a/pkgs/development/python-modules/pdf2image/default.nix
+++ b/pkgs/development/python-modules/pdf2image/default.nix
@@ -20,8 +20,10 @@ buildPythonPackage rec {
   };
 
   postPatch = ''
-    # Only replace first match in file
-    sed -i '0,/poppler_path=None/s||poppler_path="${poppler_utils}/bin"|' pdf2image/pdf2image.py
+    # replace all default values of paths to poppler_utils
+    substituteInPlace pdf2image/pdf2image.py \
+      --replace-fail 'poppler_path: Union[str, PurePath] = None' \
+                     'poppler_path: Union[str, PurePath] = "${poppler_utils}/bin"'
   '';
 
   propagatedBuildInputs = [ pillow ];