diff --git a/thunderbird.spec b/thunderbird.spec
index 8265cd8..e4992e4 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -1109,17 +1109,8 @@ echo "--------------------------------------------"
 %endif
 %patch -P11 -p1 -b .rust-file-removal
 %patch -P14 -p1 -b .cargo-lock-version
-
-%if %{?system_nss}
-  %if (0%{?rhel} == 10 && %{rhel_minor_version} <= 2)
-    %patch -P15 -p1 -b .build-system-nss
-    %patch -P16 -p1 -b .tb-build-system-nss
-  %endif
-  %if (0%{?rhel} == 9 && %{rhel_minor_version} <= 8)
-    %patch -P15 -p1 -b .build-system-nss
-    %patch -P16 -p1 -b .tb-build-system-nss
-  %endif
-%endif
+%patch -P15 -p1 -b .build-system-nss
+%patch -P16 -p1 -b .tb-build-system-nss
 
 %patch -P18 -p1 -b .annobin-fix
 %patch -P19 -p1 -b .min-lexical