diff --git a/pkgs/development/python-modules/numba/default.nix b/pkgs/development/python-modules/numba/default.nix
index 055482e063d2..b8053c53c453 100644
--- a/pkgs/development/python-modules/numba/default.nix
+++ b/pkgs/development/python-modules/numba/default.nix
@@ -47,14 +47,10 @@ buildPythonPackage rec {
     #
     # - https://git-scm.com/docs/gitattributes#_export_subst and
     # - https://github.com/numba/numba/blame/5ef7c86f76a6e8cc90e9486487294e0c34024797/numba/_version.py#L25-L31
-    #
-    # Hence this hash may change if GitHub / Git will change it's behavior.
-    # Hopefully this will not happen until the next release. We are fairly sure
-    # that upstream relies on those strings to be valid, that's why we don't
-    # use `forceFetchGit = true;`.` If in the future we'll observe the hash
-    # changes too often, we can always use forceFetchGit, and inject the
-    # relevant strings ourselves, using `substituteInPlace`, in postFetch.
-    hash = "sha256-4CaTJPaQduJqD0NQOPp1qsDr/BeCjbfZhulVW/x2ZAU=";
+    postFetch = ''
+      sed -i 's/git_refnames = "[^"]*"/git_refnames = " (tag: ${src.tag})"/' $out/numba/_version.py
+    '';
+    hash = "sha256-d09armWFI55fqyYCzZNVOq6f5b8BTk0s8fjU0OGrNgo=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/pytensor/default.nix b/pkgs/development/python-modules/pytensor/default.nix
index 0a63afaf7fa8..5c1f81b4fcaa 100644
--- a/pkgs/development/python-modules/pytensor/default.nix
+++ b/pkgs/development/python-modules/pytensor/default.nix
@@ -39,6 +39,9 @@ buildPythonPackage rec {
     owner = "pymc-devs";
     repo = "pytensor";
     tag = "rel-${version}";
+    postFetch = ''
+      sed -i 's/git_refnames = "[^"]*"/git_refnames = " (tag: ${src.tag})"/' $out/pytensor/_version.py
+    '';
     hash = "sha256-Iyiuvt86pfz8MmpwgDecKJFVOw+fKpEaA9m1MBA9Yxs=";
   };