diff --git a/pkgs/applications/audio/espeak-ng/default.nix b/pkgs/applications/audio/espeak-ng/default.nix
index 32cec811d002..a284be438325 100644
--- a/pkgs/applications/audio/espeak-ng/default.nix
+++ b/pkgs/applications/audio/espeak-ng/default.nix
@@ -21,15 +21,16 @@ stdenv.mkDerivation rec {
 
   preConfigure = "./autogen.sh";
 
-  postInstall = ''
+  postInstall = lib.optionalString stdenv.isLinux ''
     patchelf --set-rpath "$(patchelf --print-rpath $out/bin/espeak-ng)" $out/bin/speak-ng
   '';
 
   meta = with stdenv.lib; {
     description = "Open source speech synthesizer that supports over 70 languages, based on eSpeak";
-    homepage = src.meta.homepage;
+    homepage = "https://github.com/espeak-ng/espeak-ng";
+    changelog = "https://github.com/espeak-ng/espeak-ng/blob/${version}/CHANGELOG.md";
     license = licenses.gpl3;
     maintainers = with maintainers; [ aske ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/development/libraries/pcaudiolib/default.nix b/pkgs/development/libraries/pcaudiolib/default.nix
index 12def747361b..e9c5301aac56 100644
--- a/pkgs/development/libraries/pcaudiolib/default.nix
+++ b/pkgs/development/libraries/pcaudiolib/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
   version = "1.1";
 
   src = fetchFromGitHub {
-    owner = "rhdunn";
+    owner = "espeak-ng";
     repo = "pcaudiolib";
     rev = version;
     sha256 = "0c55hlqqh0m7bcb3nlgv1s4a22s5bgczr1cakjh3767rjb10khi0";
@@ -16,15 +16,17 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoconf automake which libtool pkgconfig ];
 
-  buildInputs = [ portaudio alsaLib ] ++ lib.optional pulseaudioSupport libpulseaudio;
+  buildInputs = [ portaudio ]
+    ++ lib.optionals stdenv.isLinux [ alsaLib ]
+    ++ lib.optionals pulseaudioSupport [ libpulseaudio ];
 
   preConfigure = "./autogen.sh";
 
   meta = with stdenv.lib; {
     description = "Provides a C API to different audio devices";
-    homepage = "https://github.com/rhdunn/pcaudiolib";
+    homepage = "https://github.com/espeak-ng/pcaudiolib";
     license = licenses.gpl3;
     maintainers = with maintainers; [ aske ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/development/libraries/sonic/default.nix b/pkgs/development/libraries/sonic/default.nix
index 41b88b7f310e..fc45e220a51c 100644
--- a/pkgs/development/libraries/sonic/default.nix
+++ b/pkgs/development/libraries/sonic/default.nix
@@ -1,27 +1,33 @@
-{ stdenv, fetchFromGitHub, fftw }:
+{ stdenv, fetchFromGitHub, fftw, installShellFiles }:
 
 stdenv.mkDerivation {
-  pname = "sonic";
-  version = "2018-07-06";
+  pname = "sonic-unstable";
+  version = "2020-12-27";
 
   src = fetchFromGitHub {
     owner = "waywardgeek";
     repo = "sonic";
-    rev = "71c51195de71627d7443d05378c680ba756545e8";
-    sha256 = "1z9qdk3pk507hdg39v2z1hanlw2wv7mhn8br4cb8qry9z9qwi87i";
+    rev = "4a052d9774387a9d9b4af627f6a74e1694419960";
+    sha256 = "0ah54nizb6iwcx277w104wsfnx05vrp4sh56d2pfxhf8xghg54m6";
   };
 
-  postPatch = ''
-    sed -i "s,^PREFIX=.*,PREFIX=$out," Makefile
-  '';
+  makeFlags = [ "PREFIX=${placeholder "out"}" "CC=cc" ];
+
+  nativeBuildInputs = [ installShellFiles ];
 
   buildInputs = [ fftw ];
 
+  postInstall = ''
+    installManPage sonic.1
+  '' + stdenv.lib.optionalString stdenv.isDarwin ''
+    install_name_tool -id $out/lib/libsonic.so.0.3.0 $out/lib/libsonic.so.0.3.0
+  '';
+
   meta = with stdenv.lib; {
     description = "Simple library to speed up or slow down speech";
     homepage = "https://github.com/waywardgeek/sonic";
     license = licenses.asl20;
     maintainers = with maintainers; [ aske ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }