diff --git a/pkgs/by-name/oa/oama/0001-Downgrade-cabal-version-for-ghc-9.6-compat.patch b/pkgs/by-name/oa/oama/0001-Downgrade-cabal-version-for-ghc-9.6-compat.patch
deleted file mode 100644
index 1e2a4150f0ab..000000000000
--- a/pkgs/by-name/oa/oama/0001-Downgrade-cabal-version-for-ghc-9.6-compat.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-From d6d43789bf5af99c9c18f4c88e6a6751bdcacbce Mon Sep 17 00:00:00 2001
-From: Nick Hu <me@nickhu.co.uk>
-Date: Wed, 16 Apr 2025 15:18:02 +0100
-Subject: [PATCH] Downgrade cabal-version for ghc 9.6 compat
-
----
- oama.cabal | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/oama.cabal b/oama.cabal
-index 658c051..4d0c428 100644
---- a/oama.cabal
-+++ b/oama.cabal
-@@ -1,4 +1,4 @@
--cabal-version:      3.12
-+cabal-version:      3.8
- name:               oama
- version:            0.19.0
- license:            BSD-3-Clause
--- 
-2.48.1
-
diff --git a/pkgs/by-name/oa/oama/generated-package.nix b/pkgs/by-name/oa/oama/generated-package.nix
index 3385f05bf7a6..e78d118a8e0b 100644
--- a/pkgs/by-name/oa/oama/generated-package.nix
+++ b/pkgs/by-name/oa/oama/generated-package.nix
@@ -31,11 +31,11 @@
 }:
 mkDerivation {
   pname = "oama";
-  version = "0.19.0";
+  version = "0.20.1";
   src = fetchgit {
     url = "https://github.com/pdobsan/oama.git";
-    sha256 = "1nrgpnh76fcmkdw1j3ha5cam7bnxkgfns2plj8609qv0v0swmj4s";
-    rev = "3eef17b7e290dfced252375a13bc8dd46849adf0";
+    sha256 = "sha256-59tKAHL7rCZJyfraD7NnwFR5iP6784IcgH82hfsFHiA=";
+    rev = "99659a8567808b28885ed241abe4df03f37e92fc";
     fetchSubmodules = true;
   };
   isLibrary = true;
diff --git a/pkgs/by-name/oa/oama/package.nix b/pkgs/by-name/oa/oama/package.nix
index 0e4f99ad3d1e..d68fc20ae775 100644
--- a/pkgs/by-name/oa/oama/package.nix
+++ b/pkgs/by-name/oa/oama/package.nix
@@ -1,6 +1,5 @@
 {
   haskell,
-  haskellPackages,
   lib,
   stdenv,
 }:
@@ -8,7 +7,6 @@ let
   inherit (haskell.lib.compose) overrideCabal justStaticExecutables;
 
   overrides = {
-    patches = [ ./0001-Downgrade-cabal-version-for-ghc-9.6-compat.patch ];
     description = "OAuth credential MAnager";
     homepage = "https://github.com/pdobsan/oama";
     maintainers = with lib.maintainers; [ aidalgol ];
@@ -16,7 +14,7 @@ let
     passthru.updateScript = ./update.sh;
   };
 
-  raw-pkg = haskellPackages.callPackage ./generated-package.nix { };
+  raw-pkg = haskell.packages.ghc912.callPackage ./generated-package.nix { };
 in
 lib.pipe raw-pkg [
   (overrideCabal overrides)