diff --git a/pkgs/servers/sql/mysql/5.1.x.nix b/pkgs/servers/sql/mysql/5.1.x.nix
index 3389f8114896..caf6149e62c0 100644
--- a/pkgs/servers/sql/mysql/5.1.x.nix
+++ b/pkgs/servers/sql/mysql/5.1.x.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, ps, ncurses, zlib, perl, openssl}:
+{ stdenv, fetchurl, ps, ncurses, zlib, perl, openssl }:
 
 # Note: zlib is not required; MySQL can use an internal zlib.
 
@@ -10,16 +10,21 @@ stdenv.mkDerivation rec {
     sha256 = "1dfwi4ck0vq6sdci6gz0031s7zz5lc3pddqlgm0292s00l9y5sq5";
   };
 
-  buildInputs = [ncurses zlib perl openssl] ++ stdenv.lib.optional stdenv.isLinux ps;
+  buildInputs = [ ncurses zlib perl openssl ] ++ stdenv.lib.optional stdenv.isLinux ps;
 
-  configureFlags = "--enable-thread-safe-client --with-ssl=${openssl} --with-embedded-server --with-plugins=max-no-ndb" +
-    (if stdenv.system == "x86_64-linux" then " --with-lib-ccflags=-fPIC" else "");
+  configureFlags = [
+    "--enable-thread-safe-client"
+    "--with-ssl=${openssl}"
+    "--with-embedded-server"
+    "--with-plugins=max-no-ndb"
+    "--with-unix-socket-path=/run/mysqld/mysqld.sock"
+  ] ++ stdenv.lib.optional (stdenv.system == "x86_64-linux") " --with-lib-ccflags=-fPIC";
 
   NIX_CFLAGS_COMPILE = if stdenv.system == "x86_64-linux" then "-fPIC" else "";
   NIX_CFLAGS_CXXFLAGS = if stdenv.system == "x86_64-linux" then "-fPIC" else "";
   NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isLinux "-lgcc_s";
 
-  patches = [./abi_check.patch];
+  patches = [ ./abi_check.patch ];
 
   postInstall =
     ''