diff --git a/pkgs/development/libraries/libtsm/darwin.patch b/pkgs/development/libraries/libtsm/darwin.patch
deleted file mode 100644
index d447be456e0e..000000000000
--- a/pkgs/development/libraries/libtsm/darwin.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-From 4e7b7b1124bfbccb43820997164b00720bf5ca31 Mon Sep 17 00:00:00 2001
-From: Florian Gilcher <florian.gilcher@asquera.de>
-Date: Sun, 23 Mar 2014 23:05:44 +0100
-Subject: [PATCH] Remove GCC specific flags
-
----
- Makefile.am | 10 ++--------
- 1 file changed, 2 insertions(+), 8 deletions(-)
-
-diff --git a/Makefile.am b/Makefile.am
-index f1e872b..c011f02 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -69,11 +69,7 @@ AM_CFLAGS = \
- AM_CPPFLAGS = \
- 	-include $(top_builddir)/config.h \
- 	-I $(srcdir)/src
--AM_LDFLAGS = \
--	-Wl,--as-needed \
--	-Wl,--gc-sections \
--	-Wl,-z,relro \
--	-Wl,-z,now
-+AM_LDFLAGS =
- 
- if BUILD_ENABLE_DEBUG
- AM_CFLAGS += -g
-@@ -134,9 +130,7 @@ libtsm_la_CPPFLAGS = $(AM_CPPFLAGS)
- libtsm_la_LIBADD = libshl.la
- EXTRA_libtsm_la_DEPENDENCIES = $(top_srcdir)/docs/libtsm.sym
- libtsm_la_LDFLAGS = \
--	$(AM_LDFLAGS) \
--	-version-info $(LIBTSM_CURRENT):$(LIBTSM_REVISION):$(LIBTSM_AGE) \
--	-Wl,--version-script="$(top_srcdir)/docs/libtsm.sym"
-+	$(AM_LDFLAGS)
- 
- if BUILD_HAVE_XKBCOMMON
- libtsm_la_CPPFLAGS += $(XKBCOMMON_CFLAGS)
diff --git a/pkgs/development/libraries/libtsm/default.nix b/pkgs/development/libraries/libtsm/default.nix
index ebeb927aaa47..21108fa108e4 100644
--- a/pkgs/development/libraries/libtsm/default.nix
+++ b/pkgs/development/libraries/libtsm/default.nix
@@ -1,23 +1,21 @@
-{ stdenv, lib, fetchurl, libxkbcommon, pkgconfig, autoreconfHook }:
+{ stdenv, fetchFromGitHub, libxkbcommon, pkgconfig, cmake }:
 
 stdenv.mkDerivation rec {
-  name = "libtsm-3";
+  pname = "libtsm";
+  version = "4.0.1";
 
-  src = fetchurl {
-    url = "https://freedesktop.org/software/kmscon/releases/${name}.tar.xz";
-    sha256 = "01ygwrsxfii0pngfikgqsb4fxp8n1bbs47l7hck81h9b9bc1ah8i";
+  src = fetchFromGitHub {
+    owner = "Aetf";
+    repo = "libtsm";
+    rev = "v${version}";
+    sha256 = "0mwn91i5h5d518i1s05y7hzv6bc13vzcvxszpfh77473iwg4wprx";
   };
 
-  nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ libxkbcommon ] ++ lib.optionals stdenv.isDarwin [
-    autoreconfHook
-  ];
+  buildInputs = [ libxkbcommon ];
 
-  configureFlags = [ "--disable-debug" ];
+  nativeBuildInputs = [ cmake pkgconfig ];
 
-  patches = lib.optional stdenv.isDarwin ./darwin.patch;
-
-  meta = with lib; {
+  meta = with stdenv.lib; {
     description = "Terminal-emulator State Machine";
     homepage = "http://www.freedesktop.org/wiki/Software/kmscon/libtsm/";
     license = licenses.mit;
diff --git a/pkgs/os-specific/linux/kmscon/default.nix b/pkgs/os-specific/linux/kmscon/default.nix
index a79f762a8a21..29f99629df87 100644
--- a/pkgs/os-specific/linux/kmscon/default.nix
+++ b/pkgs/os-specific/linux/kmscon/default.nix
@@ -1,5 +1,6 @@
 { stdenv
-, fetchurl
+, fetchFromGitHub
+, autoreconfHook
 , libtsm
 , systemd
 , libxkbcommon
@@ -13,32 +14,32 @@
 }:
 
 stdenv.mkDerivation rec {
-  name = "kmscon-8";
+  pname = "kmscon";
+  version = "unstable-2018-09-07";
 
-  src = fetchurl {
-    url = "https://www.freedesktop.org/software/kmscon/releases/${name}.tar.xz";
-    sha256 = "0axfwrp3c8f4gb67ap2sqnkn75idpiw09s35wwn6kgagvhf1rc0a";
+  src = fetchFromGitHub {
+    owner = "Aetf";
+    repo = "kmscon";
+    rev = "01dd0a231e2125a40ceba5f59fd945ff29bf2cdc";
+    sha256 = "0q62kjsvy2iwy8adfiygx2bfwlh83rphgxbis95ycspqidg9py87";
   };
 
   buildInputs = [
-    libtsm
-    systemd
-    libxkbcommon
-    libdrm
     libGLU libGL
+    libdrm
+    libtsm
+    libxkbcommon
+    libxslt
     pango
     pixman
-    pkgconfig
-    docbook_xsl
-    libxslt
+    systemd
   ];
 
-  patches = [ ./kmscon-8-glibc-2.26.patch ];
-
-  # FIXME: Remove as soon as kmscon > 8 comes along.
-  postPatch = ''
-    sed -i -e 's/libsystemd-daemon libsystemd-login/libsystemd/g' configure
-  '';
+  nativeBuildInputs = [
+    autoreconfHook
+    docbook_xsl
+    pkgconfig
+  ];
 
   configureFlags = [
     "--enable-multi-seat"
@@ -49,10 +50,10 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "KMS/DRM based System Console";
     homepage = "http://www.freedesktop.org/wiki/Software/kmscon/";
-    license = stdenv.lib.licenses.mit;
-    platforms = stdenv.lib.platforms.linux;
+    license = licenses.mit;
+    platforms = platforms.linux;
   };
 }
diff --git a/pkgs/os-specific/linux/kmscon/kmscon-8-glibc-2.26.patch b/pkgs/os-specific/linux/kmscon/kmscon-8-glibc-2.26.patch
deleted file mode 100644
index b70a750180e2..000000000000
--- a/pkgs/os-specific/linux/kmscon/kmscon-8-glibc-2.26.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-diff --git a/src/pty.c b/src/pty.c
-index 3494104..1443f4a 100644
---- a/src/pty.c
-+++ b/src/pty.c
-@@ -299,7 +299,7 @@ static void setup_child(int master, struct winsize *ws)
- 	if (ret)
- 		log_warn("cannot reset blocked signals: %m");
- 
--	for (i = 1; i < SIGUNUSED; ++i)
-+	for (i = 1; i < SIGSYS; ++i)
- 		signal(i, SIG_DFL);
- 
- 	ret = grantpt(master);
-diff --git a/src/uterm_vt.c b/src/uterm_vt.c
-index af377f5..fbe9e76 100644
---- a/src/uterm_vt.c
-+++ b/src/uterm_vt.c
-@@ -40,6 +40,7 @@
- #include <sys/ioctl.h>
- #include <sys/signalfd.h>
- #include <sys/stat.h>
-+#include <sys/sysmacros.h>
- #include <termios.h>
- #include <time.h>
- #include <unistd.h>