diff --git a/pkgs/games/xpilot/bloodspilot-server.nix b/pkgs/games/xpilot/bloodspilot-server.nix
index 3c811f1ba2ef..42bcb3263169 100644
--- a/pkgs/games/xpilot/bloodspilot-server.nix
+++ b/pkgs/games/xpilot/bloodspilot-server.nix
@@ -1,23 +1,27 @@
-{stdenv, fetchurl, expat}:
-let
-  buildInputs = [
-    expat
-  ];
-in
+{ stdenv, fetchurl, expat }:
+
 stdenv.mkDerivation rec {
-  version = "1.4.6";
   name = "bloodspilot-xpilot-fxi-server-${version}";
-  inherit buildInputs;
+  version = "1.4.6";
+
   src = fetchurl {
     url = "mirror://sourceforge/project/bloodspilot/server/server%20v${version}/xpilot-${version}fxi.tar.gz";
     sha256 = "0d7hnpshifq6gy9a0g6il6h1hgqqjyys36n8w84hr8d4nhg4d1ji";
   };
-  meta = {
-    inherit version;
-    description = ''A multiplayer X11 space combat game (server part)'';
-    homepage = "http://bloodspilot.sf.net/";
-    license = stdenv.lib.licenses.gpl2Plus ;
-    maintainers = [stdenv.lib.maintainers.raskin];
-    platforms = stdenv.lib.platforms.linux;
+
+  buildInputs = [
+    expat
+  ];
+
+  patches = [
+    ./server-gcc5.patch
+  ];
+
+  meta = with stdenv.lib; {
+    description = "A multiplayer X11 space combat game (server part)";
+    homepage = http://bloodspilot.sf.net/;
+    license = licenses.gpl2Plus ;
+    maintainers = [ maintainers.raskin ];
+    platforms = platforms.linux;
   };
 }
diff --git a/pkgs/games/xpilot/server-gcc5.patch b/pkgs/games/xpilot/server-gcc5.patch
new file mode 100644
index 000000000000..5618399bfecd
--- /dev/null
+++ b/pkgs/games/xpilot/server-gcc5.patch
@@ -0,0 +1,65 @@
+--- xpilot-1.4.6fxi/src/common/net.c	2016-02-09 00:20:43.531714342 +0000
++++ xpilot-1.4.6fxi/src/common/net.c	2016-02-09 00:21:15.301331053 +0000
+@@ -608,9 +608,9 @@
+ }
+ 
+ #if STDVA
+-inline int32_t Packet_scanf(sockbuf_t *sbuf, const char *fmt, ...)
++extern int32_t Packet_scanf(sockbuf_t *sbuf, const char *fmt, ...)
+ #else
+-inline int32_t Packet_scanf(va_alist)
++extern int32_t Packet_scanf(va_alist)
+ va_dcl
+ #endif
+ {
+--- xpilot-1.4.6fxi/src/server/collision.c	2016-02-09 00:22:29.581784405 +0000
++++ xpilot-1.4.6fxi/src/server/collision.c	2016-02-09 00:22:38.152952500 +0000
+@@ -71,7 +71,7 @@
+  * p: first object, q: second object
+  */
+ 
+-inline int32_t Collision_occured(int32_t p1x, int32_t p1y, int32_t p2x, int32_t p2y,
++extern int32_t Collision_occured(int32_t p1x, int32_t p1y, int32_t p2x, int32_t p2y,
+ 		int32_t q1x, int32_t q1y, int32_t q2x, int32_t q2y, int32_t r)
+ {
+ 	int32_t fac1, fac2;	/* contraction between the distance between the x and y coordinates of objects */
+--- xpilot-1.4.6fxi/src/server/player.c	2016-02-09 00:25:29.546313808 +0000
++++ xpilot-1.4.6fxi/src/server/player.c	2016-02-09 00:25:40.464527932 +0000
+@@ -1411,12 +1411,12 @@
+ 	return NULL;
+ }
+ 
+-inline bool Player_idle_timed_out(player_t *pl)
++extern bool Player_idle_timed_out(player_t *pl)
+ {
+ 	return (frame_loops - pl->frame_last_busy > MAX_PLAYER_IDLE_TICKS && (NumPlayers > 1)) ? true : false;
+ }
+ 
+-inline bool Player_is_recovered(player_t *pl)
++extern bool Player_is_recovered(player_t *pl)
+ {
+ 	return (pl->recovery_count <= 0.0) ? true : false;
+ }
+--- xpilot-1.4.6fxi/src/server/score.c	2016-02-09 00:21:45.659923025 +0000
++++ xpilot-1.4.6fxi/src/server/score.c	2016-02-09 00:22:07.224345939 +0000
+@@ -24,17 +24,17 @@
+ char msg[MSG_LEN];
+ 
+ 
+-inline double Get_Score(player_t *pl)
++extern double Get_Score(player_t *pl)
+ {
+     return pl->score;
+ }
+ 
+-inline void Score_set(player_t * pl, double score)
++extern void Score_set(player_t * pl, double score)
+ {
+     pl->score = score;
+ }
+ 
+-inline void Score_add(player_t * pl, double score)
++extern void Score_add(player_t * pl, double score)
+ {
+     pl->score += score;
+ }