diff --git a/pkgs/os-specific/linux/criu/criu-2.12.1-glibc-2.26.patch b/pkgs/os-specific/linux/criu/criu-2.12.1-glibc-2.26.patch
new file mode 100644
index 00000000000..916161e35a4
--- /dev/null
+++ b/pkgs/os-specific/linux/criu/criu-2.12.1-glibc-2.26.patch
@@ -0,0 +1,13 @@
+--- a/criu/cr-restore.c
++++ b/criu/cr-restore.c
+@@ -650,3 +650,2 @@ static void zombie_prepare_signals(void)
+ 		(1 << SIGSYS)	|\
+-		(1 << SIGUNUSED)|\
+ 		(1 << SIGSTKFLT)|\
+--- a/test/zdtm/static/pthread01.c
++++ b/test/zdtm/static/pthread01.c
+@@ -45,3 +45,3 @@ static char *decode_signal(const sigset_t *s, char *buf)
+ 	COLLECT(SIGXFSZ); COLLECT(SIGVTALRM); COLLECT(SIGPROF); COLLECT(SIGWINCH); COLLECT(SIGIO);
+-	COLLECT(SIGPOLL); COLLECT(SIGPWR); COLLECT(SIGSYS); COLLECT(SIGUNUSED);
++	COLLECT(SIGPOLL); COLLECT(SIGPWR); COLLECT(SIGSYS);
+ #undef COLLECT
diff --git a/pkgs/os-specific/linux/criu/default.nix b/pkgs/os-specific/linux/criu/default.nix
index 23d1c4821b8..4ceb397d9f8 100644
--- a/pkgs/os-specific/linux/criu/default.nix
+++ b/pkgs/os-specific/linux/criu/default.nix
@@ -11,11 +11,13 @@ stdenv.mkDerivation rec {
     sha256 = "18m0sjgcfvzc86w49fd3kxw145nmrsvc5w7zf42nxdiklmszbr1k";
   };
 
+  patches = [ ./criu-2.12.1-glibc-2.26.patch ];
+
   enableParallelBuilding = true;
   nativeBuildInputs = [ pkgconfig docbook_xsl ];
   buildInputs = [ protobuf protobufc asciidoc xmlto libpaper libnl libcap libnet python ];
 
-  patchPhase = ''
+  postPatch = ''
     chmod +w ./scripts/gen-offsets.sh
     substituteInPlace ./scripts/gen-offsets.sh --replace hexdump ${utillinux}/bin/hexdump
     substituteInPlace ./Documentation/Makefile --replace "2>/dev/null" ""