diff --git a/pkgs/development/libraries/libev/default.nix b/pkgs/development/libraries/libev/default.nix
index ce7d7b9e2759..d27df16eb944 100644
--- a/pkgs/development/libraries/libev/default.nix
+++ b/pkgs/development/libraries/libev/default.nix
@@ -4,10 +4,12 @@ stdenv.mkDerivation rec {
   name = "libev-${version}";
   version="4.19";
   src = fetchurl {
-    url = "http://dist.schmorp.de/libev/${name}.tar.gz";
+    url = "http://dist.schmorp.de/libev/Attic/${name}.tar.gz";
     sha256 = "1jyw7qbl0spxqa0dccj9x1jsw7cj7szff43cq4acmklnra4mzz48";
   };
 
+  patches = [ ./noreturn.patch ];
+
   # Version 4.19 is not valid C11 (which Clang default to)
   # Check if this is still necessary on upgrade
   NIX_CFLAGS_COMPILE = if stdenv.cc.isClang then "-std=c99" else null;
diff --git a/pkgs/development/libraries/libev/noreturn.patch b/pkgs/development/libraries/libev/noreturn.patch
new file mode 100644
index 000000000000..85e2eaee6b47
--- /dev/null
+++ b/pkgs/development/libraries/libev/noreturn.patch
@@ -0,0 +1,13 @@
+diff --git a/ev.c b/ev.c
+index 6f36c6d..b8a1c5f 100644
+--- a/ev.c
++++ b/ev.c
+@@ -1026,7 +1026,7 @@ ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (
+   #define ecb_unreachable() __builtin_unreachable ()
+ #else
+   /* this seems to work fine, but gcc always emits a warning for it :/ */
+-  ecb_inline void ecb_unreachable (void) ecb_noreturn;
++  ecb_inline ecb_noreturn void ecb_unreachable (void);
+   ecb_inline void ecb_unreachable (void) { }
+ #endif
+ 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f315b2e24abe..87acf28cef9a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5743,6 +5743,12 @@ let
       sha256 = "0cds7yvwdlqmd590i59vzxaviwxk4js6dkhnmdxb3p1xac7wmq9s";
     };
 
+    patchPhase = ''
+      pushd libev
+      patch -p1 < ${../development/libraries/libev/noreturn.patch}
+      popd
+    '';
+
     buildInputs = with self; [ pkgs.libev ];
     propagatedBuildInputs = optionals (!isPyPy) [ self.greenlet ];