diff --git a/pkgs/development/libraries/vapoursynth-mvtools/default.nix b/pkgs/development/libraries/vapoursynth-mvtools/default.nix
index 8ae95bc942e5..1a1e70d89bc7 100644
--- a/pkgs/development/libraries/vapoursynth-mvtools/default.nix
+++ b/pkgs/development/libraries/vapoursynth-mvtools/default.nix
@@ -4,13 +4,13 @@
 
 stdenv.mkDerivation rec {
   name = "vapoursynth-mvtools-${version}";
-  version = "17";
+  version = "19";
 
   src = fetchFromGitHub {
     owner = "dubhater";
     repo  = "vapoursynth-mvtools";
-    rev    = "a2f5607420af8b8e76c0a6a06a517649bfa2c187";
-    sha256 = "06nq46jjyfpv74i27w2m6j64avs6shl99mk601m5h5mmdgm2mvcg";
+    rev    = "v${version}";
+    sha256 = "1wjwf1lgfkqz87s0j251g625mw9xmx79zzgrjyhq3wlii73m6qwp";
   };
 
   buildInputs = [
diff --git a/pkgs/development/libraries/vapoursynth/default.nix b/pkgs/development/libraries/vapoursynth/default.nix
index ae43307cf31d..b37f28f868ea 100644
--- a/pkgs/development/libraries/vapoursynth/default.nix
+++ b/pkgs/development/libraries/vapoursynth/default.nix
@@ -1,36 +1,39 @@
 { stdenv, fetchFromGitHub, pkgconfig, autoreconfHook,
-  glibc, zimg, imagemagick, libass, yasm, python3,
-  ocrSupport ? false, tesseract
+  zimg, libass, yasm, python3,
+  ocrSupport ?  false, tesseract,
+  imwriSupport? true,  imagemagick7
 }:
 
-assert ocrSupport -> tesseract != null;
+assert ocrSupport   -> tesseract != null;
+assert imwriSupport -> imagemagick7 != null;
 
 with stdenv.lib;
 
 stdenv.mkDerivation rec {
   name = "vapoursynth-${version}";
-  version = "R36";
+  version = "R38";
 
   src = fetchFromGitHub {
     owner  = "vapoursynth";
     repo   = "vapoursynth";
     rev    = version;
-    sha256 = "10yiccj7yd4bd3a6k15xahb5y3ymcagyaqavh0wal2rwzfck9k8c";
+    sha256 = "0nabl6949s7awy7rnr4ck52v50xr0hwr280fyzsqixgp8w369jn0";
   };
 
   buildInputs = [
     pkgconfig autoreconfHook
-    zimg imagemagick libass glibc tesseract yasm
+    zimg libass tesseract yasm
     (python3.withPackages (ps: with ps; [ sphinx cython ]))
-  ] ++ optional ocrSupport tesseract;
+  ] ++ optional ocrSupport   tesseract
+    ++ optional imwriSupport imagemagick7;
 
   configureFlags = [
-    "--enable-imwri"
     "--disable-static"
-    (optionalString (!ocrSupport) "--disable-ocr")
+    (optionalString (!ocrSupport)   "--disable-ocr")
+    (optionalString (!imwriSupport) "--disable-imwri")
   ];
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A video processing framework with the future in mind";
     homepage    = http://www.vapoursynth.com/;
     license     = licenses.lgpl21;