diff --git a/pkgs/servers/foundationdb/cmake.nix b/pkgs/servers/foundationdb/cmake.nix
index a578b7e0e538..4ae96e95269c 100644
--- a/pkgs/servers/foundationdb/cmake.nix
+++ b/pkgs/servers/foundationdb/cmake.nix
@@ -41,7 +41,7 @@ let
 
         cmakeFlags =
           [ "-DCMAKE_BUILD_TYPE=Release"
-            (lib.optionalString officialRelease "FDB_RELEASE=1")
+            (lib.optionalString officialRelease "-DFDB_RELEASE=TRUE")
 
             # FIXME: why can't libressl be found automatically?
             "-DLIBRESSL_USE_STATIC_LIBS=FALSE"
diff --git a/pkgs/servers/foundationdb/default.nix b/pkgs/servers/foundationdb/default.nix
index 713cc135d294..ec28986f2e20 100644
--- a/pkgs/servers/foundationdb/default.nix
+++ b/pkgs/servers/foundationdb/default.nix
@@ -69,11 +69,9 @@ in with builtins; {
   # ------------------------------------------------------
 
   foundationdb61 = cmakeBuild rec {
-    version = "6.1.7pre4928_${substring 0 7 rev}";
+    version = "6.1.8";
     branch  = "release-6.1";
-    rev     = "a990458e81612632159bbf75167a36f64ef228d1";
-    sha256  = "1b8ij78xjy30q93hvnrw8llw16q5zlmlq3l6dvnnf8w6ws88y1k0";
-    officialRelease = false;
+    sha256  = "1qd9yf3a7a99nfx7vky0jy8r74yrxjwp9imc6792awn66256pxiv";
 
     patches = [
       ./patches/clang-libcxx.patch