diff --git a/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix b/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix
index 206754a51955..f355c540f301 100644
--- a/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix
@@ -15,7 +15,6 @@ stdenv.mkDerivation rec {
   buildPhase = ''
     faust2jaqt -vec -time -t 99999 CharacterCompressor.dsp
     faust2jaqt -vec -time -t 99999 CharacterCompressorMono.dsp
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "lib/CharacterCompressor.lib"
     faust2lv2 -vec -time -gui -t 99999 CharacterCompressor.dsp
     faust2lv2 -vec -time -gui -t 99999 CharacterCompressorMono.dsp
   '';
diff --git a/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix b/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix
index 467e11daaf65..90e4eabeef0b 100644
--- a/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix
@@ -18,8 +18,6 @@ stdenv.mkDerivation rec {
       faust2jaqt -time -vec -double -t 99999 $f
     done
 
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "CompBus.lib"
-
     for f in *.dsp;
     do
       faust2lv2  -time -vec -double -gui -t 99999 $f
diff --git a/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix b/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix
index b452d91426e0..73dd7b48e9c4 100644
--- a/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix
@@ -14,7 +14,6 @@ stdenv.mkDerivation rec {
 
   buildPhase = ''
     faust2jaqt -time -vec -t 99999 ConstantDetuneChorus.dsp
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "ConstantDetuneChorus.dsp"
     faust2lv2  -time -vec -t 99999 -gui ConstantDetuneChorus.dsp
   '';
 
diff --git a/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix b/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix
index d1959ec3cebc..39065db6edeb 100644
--- a/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix
@@ -14,7 +14,6 @@ stdenv.mkDerivation rec {
 
   buildPhase = ''
     faust2jaqt -vec -time -t 99999 LazyLimiter.dsp
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "GUI.lib"
     faust2lv2 -vec -time -t 99999  -gui LazyLimiter.dsp
   '';
 
diff --git a/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix b/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix
index 6216ba555938..362451988d38 100644
--- a/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix
@@ -14,7 +14,6 @@ stdenv.mkDerivation rec {
 
   buildPhase = ''
     faust2jaqt -time -vec -t 99999 MBdistortion.dsp
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "MBdistortion.dsp"
     faust2lv2 -time -vec -gui -t 99999 MBdistortion.dsp
   '';
 
diff --git a/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix b/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix
index 0bb2034fc46e..3f809aa78474 100644
--- a/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix
@@ -14,7 +14,6 @@ stdenv.mkDerivation rec {
 
   buildPhase = ''
     faust2jaqt -time -vec -t 99999 RhythmDelay.dsp
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "RhythmDelay.dsp"
     faust2lv2  -time -vec -t 99999 -gui RhythmDelay.dsp
   '';
 
diff --git a/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix b/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix
index e526e40a1e36..fece392ab1cc 100644
--- a/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix
@@ -19,11 +19,9 @@ stdenv.mkDerivation rec {
       faust2jaqt -time -double -t 99999 $f
     done
 
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "compressors.lib"
-
     for f in *.dsp;
     do
-      echo "compiling plugin from" $f
+      echo "Compiling plugin from" $f
       faust2lv2  -time -double -gui -t 99999 $f
     done
   '';
diff --git a/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix b/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix
index daa23baa966b..6237628e600c 100644
--- a/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix
@@ -17,7 +17,6 @@ stdenv.mkDerivation rec {
       do
         echo "Building jack standalone for $f"
         faust2jaqt -vec -time -t 99999 "$f"
-        sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "$f"
         echo "Building lv2 for $f"
         faust2lv2 -vec -time -gui -t 99999 "$f"
       done
diff --git a/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix b/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix
index 422aabb28299..cb9247fd3d08 100644
--- a/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix
@@ -15,7 +15,6 @@ stdenv.mkDerivation rec {
   buildPhase = ''
     faust2jaqt -vec -double -time -t 99999 shelfMultiBand.dsp
     faust2jaqt -vec -double -time -t 99999 shelfMultiBandMono.dsp
-    sed -i "s|\[ *scale *: *log *\]||g ; s|\btgroup\b|hgroup|g" "shelfMultiBand.lib"
     faust2lv2 -vec -double -time -gui -t 99999 shelfMultiBandMono.dsp
     faust2lv2 -vec -double -time -gui -t 99999 shelfMultiBand.dsp
   '';