diff --git a/pkgs/applications/audio/artyFX/default.nix b/pkgs/applications/audio/artyFX/default.nix
index 0265e0f75ec..8cf9bec2e3d 100644
--- a/pkgs/applications/audio/artyFX/default.nix
+++ b/pkgs/applications/audio/artyFX/default.nix
@@ -2,13 +2,14 @@
 
 stdenv.mkDerivation rec {
   pname = "artyFX";
-  version = "1.3";
+  # Fix build with lv2 1.18: https://github.com/openAVproductions/openAV-ArtyFX/pull/41/commits/492587461b50d140455aa3c98d915eb8673bebf0
+  version = "unstable-2020-04-28";
 
   src = fetchFromGitHub {
     owner = "openAVproductions";
     repo = "openAV-ArtyFX";
-    rev = "release-${version}";
-    sha256 = "012hcy1mxl7gs2lipfcqp5x0xv1azb9hjrwf0h59yyxnzx96h7c9";
+    rev = "492587461b50d140455aa3c98d915eb8673bebf0";
+    sha256 = "0wwg8ivnpyy0235bapjy4g0ij85zq355jwi6c1nkrac79p4z9ail";
   };
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/applications/audio/drumgizmo/default.nix b/pkgs/applications/audio/drumgizmo/default.nix
index 454befd55f9..9e24c4a1c29 100644
--- a/pkgs/applications/audio/drumgizmo/default.nix
+++ b/pkgs/applications/audio/drumgizmo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, alsaLib, expat, glib, libjack2, libXext, libX11, libpng
+{ stdenv, fetchurl, fetchpatch, alsaLib, expat, glib, libjack2, libXext, libX11, libpng
 , libpthreadstubs, libsmf, libsndfile, lv2, pkgconfig, zita-resampler
 }:
 
@@ -11,6 +11,16 @@ stdenv.mkDerivation rec {
     sha256 = "0bpbkzcr3znbwfdk79c14n5k5hh80iqlk2nc03q95vhimbadk8k7";
   };
 
+  patches = [
+    # Fix build for lv2 1.18.0
+    (fetchpatch {
+      url = "http://cgit.drumgizmo.org/plugingizmo.git/patch/?id=be64ddf9da525cd5c6757464efc966052731ba71";
+      sha256 = "17w8g78i5avssc7m8rpw64ka3rai8dff81wfzir9cpxp8s2h44qf";
+      extraPrefix = "plugin/plugingizmo/";
+      stripLen = 1;
+    })
+  ];
+
   configureFlags = [ "--enable-lv2" ];
 
   buildInputs = [
diff --git a/pkgs/applications/audio/eq10q/default.nix b/pkgs/applications/audio/eq10q/default.nix
index cc3a3c9ac1f..c614b96f638 100644
--- a/pkgs/applications/audio/eq10q/default.nix
+++ b/pkgs/applications/audio/eq10q/default.nix
@@ -19,6 +19,12 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  postPatch = ''
+     # Fix build with lv2 1.18: https://sourceforge.net/p/eq10q/bugs/23/
+     find . -type f -exec fgrep -q LV2UI_Descriptor {} \; \
+       -exec sed -i {} -e 's/const _\?LV2UI_Descriptor/const LV2UI_Descriptor/' \;
+   '';
+
   installFlags = [ "DESTDIR=$(out)" ];
 
   fixupPhase = ''
diff --git a/pkgs/applications/audio/faust/faust2.nix b/pkgs/applications/audio/faust/faust2.nix
index 33df1ce5d4e..e65414b2bca 100644
--- a/pkgs/applications/audio/faust/faust2.nix
+++ b/pkgs/applications/audio/faust/faust2.nix
@@ -20,19 +20,19 @@ with stdenv.lib.strings;
 
 let
 
-  version = "unstable-2020-03-20";
+  version = "unstable-2020-06-08";
 
   src = fetchFromGitHub {
     owner = "grame-cncm";
     repo = "faust";
-    rev = "2782088d4485f1c572755f41e7a072b41cb7148a";
-    sha256 = "1l7bi2mq10s5wm8g4cdipg8gndd478x897qv0h7nqi1s2q9nq99p";
+    rev = "f0037e289987818b65d3f6fb1ad943aaad2a2b28";
+    sha256 = "0h08902rgx7rhzpng4h1qw8i2nzv50f79vrlbzdk5d35wa4zibh4";
     fetchSubmodules = true;
   };
 
   meta = with stdenv.lib; {
     homepage = "http://faust.grame.fr/";
-    downloadPage = "https://sourceforge.net/projects/faudiostream/files/";
+    downloadPage = "https://github.com/grame-cncm/faust/";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = with maintainers; [ magnetophon pmahoney ];
diff --git a/pkgs/applications/audio/faust/faust2jack.nix b/pkgs/applications/audio/faust/faust2jack.nix
index 26478b2bb2e..370c25ecd74 100644
--- a/pkgs/applications/audio/faust/faust2jack.nix
+++ b/pkgs/applications/audio/faust/faust2jack.nix
@@ -12,7 +12,6 @@ faust.wrapWithBuildEnv {
 
   scripts = [
     "faust2jack"
-    "faust2jackinternal"
     "faust2jackconsole"
   ];
 
diff --git a/pkgs/applications/audio/guitarix/default.nix b/pkgs/applications/audio/guitarix/default.nix
index f94d27565e9..9b8475006cc 100644
--- a/pkgs/applications/audio/guitarix/default.nix
+++ b/pkgs/applications/audio/guitarix/default.nix
@@ -1,8 +1,38 @@
-{ stdenv, fetchurl, fetchpatch, faust, gettext, intltool, pkgconfig, python2
-, avahi, bluez, boost, eigen, fftw, glib, glib-networking
-, glibmm, gsettings-desktop-schemas, gtkmm2, libjack2
-, ladspaH, libav, libsndfile, lilv, lrdf, lv2, serd, sord, sratom
-, wrapGAppsHook, zita-convolver, zita-resampler, curl, wafHook
+{ stdenv
+, fetchurl
+, avahi
+, bluez
+, boost
+, curl
+, eigen
+, fftw
+, gettext
+, glib
+, glib-networking
+, glibmm
+, gnome3
+, gsettings-desktop-schemas
+, gtk3
+, gtkmm3
+, hicolor-icon-theme
+, intltool
+, ladspaH
+, libav
+, libjack2
+, libsndfile
+, lilv
+, lrdf
+, lv2
+, pkgconfig
+, python2
+, sassc
+, serd
+, sord
+, sratom
+, wafHook
+, wrapGAppsHook
+, zita-convolver
+, zita-resampler
 , optimizationSupport ? false # Enable support for native CPU extensions
 }:
 
@@ -12,43 +42,67 @@ in
 
 stdenv.mkDerivation rec {
   pname = "guitarix";
-  version = "0.39.0";
+  version = "0.40.0";
 
   src = fetchurl {
     url = "mirror://sourceforge/guitarix/guitarix2-${version}.tar.xz";
-    sha256 = "1nn80m1qagfhvv69za60f0w6ck87vmk77qmqarj7fbr8avwg63s9";
+    sha256 = "0q9050499hcj19hvbxb069vxh5yclawjg04vryh46lxm4sfy9g57";
   };
 
-  patches = [
-    (fetchpatch {
-      url = "https://git.archlinux.org/svntogit/community.git/plain/trunk/guitarix-0.39.0-fix_faust_and_lv2_plugins.patch?id=8579b4dfe85e04303ad2d9771ed699f04ea7b7cf";
-      stripLen = 1;
-      sha256 = "0pgkhi4v4vrzjnig0ggmz207q4x5iyk2n6rjj8s5lv15fia7qzp4";
-    })
-  ];
+  # see: https://sourceforge.net/p/guitarix/bugs/105
+  patches = [ ./fix-build.patch ];
 
-  nativeBuildInputs = [ faust gettext intltool wrapGAppsHook pkgconfig python2 wafHook ];
+  nativeBuildInputs = [
+    gettext
+    hicolor-icon-theme
+    intltool
+    pkgconfig
+    python2
+    wafHook
+    wrapGAppsHook
+  ];
 
   buildInputs = [
-    avahi bluez boost eigen fftw glib glibmm glib-networking.out
-    gsettings-desktop-schemas gtkmm2 libjack2 ladspaH libav
-    libsndfile lilv lrdf lv2 serd sord sratom zita-convolver
-    zita-resampler curl
+    avahi
+    bluez
+    boost
+    curl
+    eigen
+    fftw
+    glib
+    glib-networking.out
+    glibmm
+    gnome3.adwaita-icon-theme
+    gsettings-desktop-schemas
+    gtk3
+    gtkmm3
+    ladspaH
+    libav
+    libjack2
+    libsndfile
+    lilv
+    lrdf
+    lv2
+    sassc
+    serd
+    sord
+    sratom
+    zita-convolver
+    zita-resampler
   ];
 
-  postPatch = ''
-    # Fix build with lv2 1.18: https://github.com/brummer10/guitarix/commit/c0334c72
-    find . -type f -exec fgrep -q LV2UI_Descriptor {} \; \
-      -exec sed -i {} -e 's/const struct _\?LV2UI_Descriptor/const LV2UI_Descriptor/' \;
-  '';
-
+  # this doesnt build, probably because we have the wrong faust version:
+  #       "--faust"
+  # aproved versions are 2.20.2 and 2.15.11
   wafConfigureFlags = [
+    "--no-faust"
+    "--no-font-cache-update"
     "--shared-lib"
     "--no-desktop-update"
     "--enable-nls"
     "--install-roboto-font"
     "--includeresampler"
-    "--convolver-ffmpeg"
+    "--includeconvolver"
   ] ++ optional optimizationSupport "--optimization";
 
   meta = with stdenv.lib; {
diff --git a/pkgs/applications/audio/guitarix/fix-build.patch b/pkgs/applications/audio/guitarix/fix-build.patch
new file mode 100644
index 00000000000..4a0e4267776
--- /dev/null
+++ b/pkgs/applications/audio/guitarix/fix-build.patch
@@ -0,0 +1,10 @@
+--- a/src/LV2/xputty/xfilepicker.cpp
++++ b/src/LV2/xputty/xfilepicker.cpp
+@@ -191,6 +191,6 @@
+     filepicker->selected_file = NULL;
+     filepicker->path = NULL;
+     filepicker->filter = NULL;
+-    asprintf(&filepicker->path, path);
++    asprintf(&filepicker->path, "%s", path);
+     assert(filepicker->path != NULL);
+ }
diff --git a/pkgs/applications/audio/infamousPlugins/default.nix b/pkgs/applications/audio/infamousPlugins/default.nix
index 2cfe77ec291..9ba835eb7ea 100644
--- a/pkgs/applications/audio/infamousPlugins/default.nix
+++ b/pkgs/applications/audio/infamousPlugins/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgconfig, cairomm, cmake, lv2, libpthreadstubs, libXdmcp, libXft, ntk, pcre, fftwFloat, zita-resampler }:
+{ stdenv, fetchFromGitHub, fetchpatch, pkgconfig, cairomm, cmake, lv2, libpthreadstubs, libXdmcp, libXft, ntk, pcre, fftwFloat, zita-resampler }:
 
 stdenv.mkDerivation rec {
   pname = "infamousPlugins";
@@ -11,6 +11,12 @@ stdenv.mkDerivation rec {
     sha256 = "1r72agk5nxf5k0mghcc2j90z43j5d9i7rqjmf49jfyqnd443isip";
   };
 
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/ssj71/infamousPlugins/commit/06dd967b4736ea886dc1dc07f882cb1563961582.patch";
+      sha256 = "08xwh6px13y1gykaw103nhvjms7vgbgkcm0avh9f5d2d7aadq0l2";
+    })
+  ];
   nativeBuildInputs = [ pkgconfig cmake ];
   buildInputs = [ cairomm lv2 libpthreadstubs libXdmcp libXft ntk pcre fftwFloat zita-resampler ];
 
diff --git a/pkgs/applications/audio/ir.lv2/default.nix b/pkgs/applications/audio/ir.lv2/default.nix
index f9f58ab5ec1..aa5eeae0a46 100644
--- a/pkgs/applications/audio/ir.lv2/default.nix
+++ b/pkgs/applications/audio/ir.lv2/default.nix
@@ -15,6 +15,13 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [  pkgconfig ];
 
+  postPatch = ''
+     # Fix build with lv2 1.18: https://github.com/tomszilagyi/ir.lv2/pull/20
+     find . -type f -exec fgrep -q LV2UI_Descriptor {} \; \
+       -exec sed -i {} -e 's/const struct _\?LV2UI_Descriptor/const LV2UI_Descriptor/' \;
+   '';
+
+
   postBuild = "make convert4chan";
 
   installPhase = ''
diff --git a/pkgs/applications/audio/lsp-plugins/default.nix b/pkgs/applications/audio/lsp-plugins/default.nix
index ae3deccf863..435da644073 100644
--- a/pkgs/applications/audio/lsp-plugins/default.nix
+++ b/pkgs/applications/audio/lsp-plugins/default.nix
@@ -1,29 +1,19 @@
-{ stdenv, fetchFromGitHub, fetchpatch, pkgconfig, makeWrapper
+{ stdenv, fetchFromGitHub, pkgconfig, makeWrapper
 , libsndfile, jack2Full
 , libGLU, libGL, lv2, cairo
 , ladspaH, php }:
 
 stdenv.mkDerivation rec {
   pname = "lsp-plugins";
-  version = "1.1.19";
+  version = "1.1.22";
 
   src = fetchFromGitHub {
     owner = "sadko4u";
     repo = pname;
     rev = "${pname}-${version}";
-    sha256 = "1wiph3vxhydc6mr9hn2c6crd4cx592l2zv0wrzgmpnlm1lflzpbg";
+    sha256 = "0s0i0kf5nqxxywckg03fds1w7696ly60rnlljzqvp7qfgzps1r6c";
   };
 
-  patches = [
-    # Fix build
-    # https://github.com/sadko4u/lsp-plugins/issues/104
-    (fetchpatch {
-      url = "https://github.com/sadko4u/lsp-plugins/commit/4d901135fb82fa95e668b4d55d05e405f5e620d2.patch";
-      excludes = [ "TODO.txt" ];
-      sha256 = "1s028gqvahvwm1px4xxxawrw2zrwyszb1aq93f0kspf3g7lq27f1";
-    })
-  ];
-
   nativeBuildInputs = [ pkgconfig php makeWrapper ];
   buildInputs = [ jack2Full libsndfile libGLU libGL lv2 cairo ladspaH ];
 
diff --git a/pkgs/applications/audio/sorcer/default.nix b/pkgs/applications/audio/sorcer/default.nix
index 7601f942868..ad5f8fda1a9 100644
--- a/pkgs/applications/audio/sorcer/default.nix
+++ b/pkgs/applications/audio/sorcer/default.nix
@@ -14,6 +14,12 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ boost cairomm cmake libsndfile lv2 ntk python ];
 
+  postPatch = ''
+     # Fix build with lv2 1.18: https://github.com/brummer10/guitarix/commit/c0334c72
+     find . -type f -exec fgrep -q LV2UI_Descriptor {} \; \
+       -exec sed -i {} -e 's/const struct _\?LV2UI_Descriptor/const LV2UI_Descriptor/' \;
+   '';
+
   installPhase = ''
     make install
     cp -a ../presets/* "$out/lib/lv2"
diff --git a/pkgs/applications/audio/yoshimi/default.nix b/pkgs/applications/audio/yoshimi/default.nix
index f8ea58fef3c..2b0a89bbaf5 100644
--- a/pkgs/applications/audio/yoshimi/default.nix
+++ b/pkgs/applications/audio/yoshimi/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, alsaLib, boost, cairo, cmake, fftwSinglePrec, fltk, pcre
+{ stdenv, fetchFromGitHub , alsaLib, boost, cairo, cmake, fftwSinglePrec, fltk, pcre
 , libjack2, libsndfile, libXdmcp, readline, lv2, libGLU, libGL, minixml, pkgconfig, zlib, xorg
 }:
 
@@ -6,13 +6,15 @@ assert stdenv ? glibc;
 
 stdenv.mkDerivation  rec {
   pname = "yoshimi";
-  version = "1.7.0.1";
+  # Fix build with lv2 1.18: https://github.com/Yoshimi/yoshimi/pull/102/commits/86996cbb235f0fe138ae814a6758c2c8ba1c2a38
+  version = "unstable-2020-05-10";
 
-  src = fetchurl {
-    url = "mirror://sourceforge/yoshimi/${pname}-${version}.tar.bz2";
-    sha256 = "1pkqrrr51vlxh96vy0c0rf5ijjvymys4brsw9rv1bdp1bb8izw6c";
+  src = fetchFromGitHub {
+    owner = "Yoshimi";
+    repo = pname;
+    rev = "86996cbb235f0fe138ae814a6758c2c8ba1c2a38";
+    sha256 = "0bgcc5fbgwpdjircq00wlii30pakf45yzligpbnf02a554hh4j01";
   };
-
   buildInputs = [
     alsaLib boost cairo fftwSinglePrec fltk libjack2 libsndfile libXdmcp readline lv2 libGLU libGL
     minixml zlib xorg.libpthreadstubs pcre
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 128d580d190..ea8af94277b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -25582,7 +25582,7 @@ in
   faust1 = callPackage ../applications/audio/faust/faust1.nix { };
 
   faust2 = callPackage ../applications/audio/faust/faust2.nix {
-    llvm = llvm_9;
+    llvm = llvm_10;
   };
 
   faust2alqt = callPackage ../applications/audio/faust/faust2alqt.nix { };