diff --git a/pkgs/games/crossfire/crossfire-arch.nix b/pkgs/games/crossfire/crossfire-arch.nix
index ff9e0f9dea6..c09f474e70c 100644
--- a/pkgs/games/crossfire/crossfire-arch.nix
+++ b/pkgs/games/crossfire/crossfire-arch.nix
@@ -3,12 +3,12 @@
 
 stdenv.mkDerivation rec {
   pname = "crossfire-arch";
-  version = "r${toString rev}";
+  version = rev;
 
   src = fetchsvn {
     url = "http://svn.code.sf.net/p/crossfire/code/arch/trunk/";
-    sha256 = sha256;
-    rev = rev;
+    inherit sha256;
+    rev = "r${rev}";
   };
 
   installPhase = ''
diff --git a/pkgs/games/crossfire/crossfire-client.nix b/pkgs/games/crossfire/crossfire-client.nix
index 799ae4ab6ee..0d335b4f529 100644
--- a/pkgs/games/crossfire/crossfire-client.nix
+++ b/pkgs/games/crossfire/crossfire-client.nix
@@ -7,12 +7,12 @@
 
 stdenv.mkDerivation rec {
   pname = "crossfire-client";
-  version = "r${toString rev}";
+  version = rev;
 
   src = fetchsvn {
     url = "http://svn.code.sf.net/p/crossfire/code/client/trunk/";
-    sha256 = sha256;
-    rev = rev;
+    inherit sha256;
+    rev = "r${rev}";
   };
 
   nativeBuildInputs = [ cmake pkg-config perl vala ];
diff --git a/pkgs/games/crossfire/crossfire-maps.nix b/pkgs/games/crossfire/crossfire-maps.nix
index 0521b038d36..cb514a90d16 100644
--- a/pkgs/games/crossfire/crossfire-maps.nix
+++ b/pkgs/games/crossfire/crossfire-maps.nix
@@ -3,12 +3,12 @@
 
 stdenv.mkDerivation rec {
   pname = "crossfire-maps";
-  version = "r${toString rev}";
+  version = rev;
 
   src = fetchsvn {
     url = "http://svn.code.sf.net/p/crossfire/code/maps/trunk/";
-    sha256 = sha256;
-    rev = rev;
+    inherit sha256;
+    rev = "r${rev}";
   };
 
   installPhase = ''
diff --git a/pkgs/games/crossfire/crossfire-server.nix b/pkgs/games/crossfire/crossfire-server.nix
index 9259e8e52fa..f99e08a5a46 100644
--- a/pkgs/games/crossfire/crossfire-server.nix
+++ b/pkgs/games/crossfire/crossfire-server.nix
@@ -4,12 +4,12 @@
 
 stdenv.mkDerivation rec {
   pname = "crossfire-server";
-  version = "r${toString rev}";
+  version = rev;
 
   src = fetchsvn {
     url = "http://svn.code.sf.net/p/crossfire/code/server/trunk/";
-    sha256 = sha256;
-    rev = rev;
+    inherit sha256;
+    rev = "r${rev}";
   };
 
   nativeBuildInputs = [ autoconf automake libtool flex perl check pkg-config python3 ];
diff --git a/pkgs/games/crossfire/default.nix b/pkgs/games/crossfire/default.nix
index bc74c00bcce..7d0716df3d9 100644
--- a/pkgs/games/crossfire/default.nix
+++ b/pkgs/games/crossfire/default.nix
@@ -3,26 +3,26 @@
 rec {
   crossfire-client = callPackage ./crossfire-client.nix {
     version = "1.75.0";
-    rev = 21760;
+    rev = "21760";
     sha256 = "0b42sak8hj60nywfswkps777asy9p8r9wsn7pmj2nqbd29ng1p9d";
   };
 
   crossfire-server = callPackage ./crossfire-server.nix {
     version = "latest";
-    rev = 22111;
+    rev = "22111";
     sha256 = "04fjif6zv642n2zlw27cgzkak2kknwrxqzg42bvzl7q901bsr9l7";
     maps = crossfire-maps; arch = crossfire-arch;
   };
 
   crossfire-arch = callPackage ./crossfire-arch.nix {
     version = "latest";
-    rev = 22111;
+    rev = "22111";
     sha256 = "0l4rp3idvbhknpxxs0w4i4nqfg01wblzm4v4j375xwxxbf00j0ms";
   };
 
   crossfire-maps = callPackage ./crossfire-maps.nix {
     version = "latest";
-    rev = 22111;
+    rev = "22111";
     sha256 = "1dwfc84acjvbjgjakkb8z8pdlksbsn90j0z8z8rq37lqx0kx1sap";
   };
 }