diff --git a/pkgs/os-specific/linux/qemu-kvm/default.nix b/pkgs/os-specific/linux/qemu-kvm/default.nix
index 032a35ece263..9223b7af917c 100644
--- a/pkgs/os-specific/linux/qemu-kvm/default.nix
+++ b/pkgs/os-specific/linux/qemu-kvm/default.nix
@@ -4,20 +4,18 @@
 
 assert stdenv.isLinux;
 
-let version = "1.0.1"; in
+let version = "1.2.0"; in
 
 stdenv.mkDerivation rec {
   name = "qemu-kvm-${version}";
 
   src = fetchurl {
     url = "mirror://sourceforge/kvm/qemu-kvm/${version}/${name}.tar.gz";
-    sha256 = "0kxzwaw8h71mqcm46angpyx8gd58ascrxnr861k068xg89ix5g2p";
+    sha256 = "018vb5nmk2fsm143bs2bl2wirhasd4b10d7jchl32zik4inbk2p9";
   };
 
-  patches = [ ./smb-tmpdir.patch ./qemu-img-fix-corrupt-vdi.patch ];
-
   postPatch =
-    '' for i in $(find kvm -type f)
+    '' for i in $(find . -type f)
        do
          sed -i "$i" \
              -e 's|/bin/bash|/bin/sh|g ;
diff --git a/pkgs/os-specific/linux/qemu-kvm/qemu-img-fix-corrupt-vdi.patch b/pkgs/os-specific/linux/qemu-kvm/qemu-img-fix-corrupt-vdi.patch
deleted file mode 100644
index 446a69a146b0..000000000000
--- a/pkgs/os-specific/linux/qemu-kvm/qemu-img-fix-corrupt-vdi.patch
+++ /dev/null
@@ -1,27 +0,0 @@
-From http://patchwork.ozlabs.org/patch/137186/
-
-diff -ru qemu-kvm-0.15.1-orig/block/vdi.c qemu-kvm-0.15.1/block/vdi.c
---- qemu-kvm-0.15.1-orig/block/vdi.c	2011-10-19 15:54:48.000000000 +0200
-+++ qemu-kvm-0.15.1/block/vdi.c	2012-02-25 18:15:36.114574574 +0100
-@@ -1,7 +1,7 @@
- /*
-  * Block driver for the Virtual Disk Image (VDI) format
-  *
-- * Copyright (c) 2009 Stefan Weil
-+ * Copyright (c) 2009, 2012 Stefan Weil
-  *
-  * This program is free software: you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License as published by
-@@ -767,8 +767,12 @@
-             acb->header_modified = 1;
-         }
-         acb->bmap_last = block_index;
-+        /* Copy data to be written to new block and zero unused parts. */
-+        memset(block, 0, sector_in_block * SECTOR_SIZE);
-         memcpy(block + sector_in_block * SECTOR_SIZE,
-                acb->buf, n_sectors * SECTOR_SIZE);
-+        memset(block + (sector_in_block + n_sectors) * SECTOR_SIZE, 0,
-+               (s->block_sectors - n_sectors - sector_in_block) * SECTOR_SIZE);
-         acb->hd_iov.iov_base = (void *)block;
-         acb->hd_iov.iov_len = s->block_size;
-         qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
diff --git a/pkgs/os-specific/linux/qemu-kvm/smb-tmpdir.patch b/pkgs/os-specific/linux/qemu-kvm/smb-tmpdir.patch
deleted file mode 100644
index 6d6c7831d15e..000000000000
--- a/pkgs/os-specific/linux/qemu-kvm/smb-tmpdir.patch
+++ /dev/null
@@ -1,33 +0,0 @@
-Honour $TMPDIR for the qemu-smb temporary directory.
-
-diff -rc -x '*~' qemu-kvm-0.12.2-orig/net/slirp.c qemu-kvm-0.12.2/net/slirp.c
-*** qemu-kvm-0.12.2-orig/net/slirp.c	2010-02-01 19:05:24.000000000 +0100
---- qemu-kvm-0.12.2/net/slirp.c	2010-02-01 19:05:54.000000000 +0100
-***************
-*** 476,486 ****
-                       struct in_addr vserver_addr)
-  {
-      static int instance;
-!     char smb_conf[128];
-!     char smb_cmdline[128];
-      FILE *f;
-  
-!     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
-               (long)getpid(), instance++);
-      if (mkdir(s->smb_dir, 0700) < 0) {
-          qemu_error("could not create samba server dir '%s'\n", s->smb_dir);
---- 476,489 ----
-                       struct in_addr vserver_addr)
-  {
-      static int instance;
-!     char smb_conf[1024];
-!     char smb_cmdline[1024];
-      FILE *f;
-  
-!     char *tmpdir = getenv("TMPDIR");
-! 
-!     snprintf(s->smb_dir, sizeof(s->smb_dir), "%s/qemu-smb.%ld-%d",
-!              tmpdir ? tmpdir : "/tmp",
-               (long)getpid(), instance++);
-      if (mkdir(s->smb_dir, 0700) < 0) {
-          qemu_error("could not create samba server dir '%s'\n", s->smb_dir);