diff --git a/srcpkgs/xen/patches/ocaml-5.patch b/srcpkgs/xen/patches/ocaml-5.patch
new file mode 100644
index 00000000000..9b590de1228
--- /dev/null
+++ b/srcpkgs/xen/patches/ocaml-5.patch
@@ -0,0 +1,28 @@
+X-Git-Url: https://xenbits.xen.org/gitweb/?p=xen.git;a=blobdiff_plain;f=tools%2Focaml%2Flibs%2FMakefile;h=89350aa12fdc6dbf0fe461bf7e4644cbb16b8462;hp=5146c524846083f343b5d4c5c2ccbb060dc94a67;hb=e51d31f79edc10f8d622e7f5bf4b935af6d4618f;hpb=bf652a50fb3bb3b1b3d93db6fb79bc28f978fe75
+
+Remove broken libs (like upstream later).
+
+--- xen-4.14.1/tools/ocaml/libs/Makefile
++++ xen-4.14.1/tools/ocaml/libs/Makefile
+@@ -3,9 +3,8 @@
+ 
+ SUBDIRS= \
+ 	mmap \
+-	xentoollog \
+ 	xc eventchn \
+-	xb xs xl
++	xb xs
+ 
+ .PHONY: all
+ all: subdirs-all
+--- xen-4.14.1/tools/ocaml/xenstored/disk.ml
++++ xen-4.14.1/tools/ocaml/xenstored/disk.ml
+@@ -30,7 +30,7 @@
+ 	| _          -> raise (Failure "undecify")
+ 
+ let unhex c =
+-	let c = Char.lowercase c in
++	let c = Char.lowercase_ascii c in
+ 	match c with
+ 	| '0' .. '9' -> (Char.code c) - (Char.code '0')
+ 	| 'a' .. 'f' -> (Char.code c) - (Char.code 'a') + 10
diff --git a/srcpkgs/xen/template b/srcpkgs/xen/template
index 011d1704fcd..52ae2f85c33 100644
--- a/srcpkgs/xen/template
+++ b/srcpkgs/xen/template
@@ -1,7 +1,7 @@
 # Template file for 'xen'
 pkgname=xen
 version=4.14.1
-revision=10
+revision=11
 # grep -R IPXE_GIT_TAG src/xen-*/tools/firmware/etherboot
 _git_tag_ipxe=4bd064de239dab2426b31c9789a1f4d78087dc63
 # TODO: arm / aarch64