diff --git a/pkgs/development/libraries/dbus-sharp-glib/dbus-sharp-glib-1.0.nix b/pkgs/development/libraries/dbus-sharp-glib/dbus-sharp-glib-1.0.nix
index 208288bfca1..0f897d97467 100644
--- a/pkgs/development/libraries/dbus-sharp-glib/dbus-sharp-glib-1.0.nix
+++ b/pkgs/development/libraries/dbus-sharp-glib/dbus-sharp-glib-1.0.nix
@@ -20,5 +20,6 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "D-Bus for .NET: GLib integration module";
     platforms = platforms.linux;
+    license = licenses.mit;
   };
 }
diff --git a/pkgs/development/libraries/dbus-sharp-glib/default.nix b/pkgs/development/libraries/dbus-sharp-glib/default.nix
index ef1ddd9bfff..cd020317f4c 100644
--- a/pkgs/development/libraries/dbus-sharp-glib/default.nix
+++ b/pkgs/development/libraries/dbus-sharp-glib/default.nix
@@ -20,5 +20,6 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "D-Bus for .NET: GLib integration module";
     platforms = platforms.linux;
+    license = licenses.mit;
   };
 }
diff --git a/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix b/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix
index 013913e5297..18ea3ad3ecb 100644
--- a/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix
+++ b/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix
@@ -20,5 +20,6 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "D-Bus for .NET";
     platforms = platforms.linux;
+    license = licenses.mit;
   };
 }
diff --git a/pkgs/development/libraries/dbus-sharp/default.nix b/pkgs/development/libraries/dbus-sharp/default.nix
index 855dd9f3832..2704ef2de9f 100644
--- a/pkgs/development/libraries/dbus-sharp/default.nix
+++ b/pkgs/development/libraries/dbus-sharp/default.nix
@@ -23,5 +23,6 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "D-Bus for .NET";
     platforms = platforms.linux;
+    license = licenses.mit;
   };
 }
diff --git a/pkgs/development/libraries/dclxvi/default.nix b/pkgs/development/libraries/dclxvi/default.nix
index 47f3794f5ad..1f8f9a4e69c 100644
--- a/pkgs/development/libraries/dclxvi/default.nix
+++ b/pkgs/development/libraries/dclxvi/default.nix
@@ -31,5 +31,6 @@ stdenv.mkDerivation {
     description = "Naehrig, Niederhagen and Schwabe's pairings code, massaged into a shared library";
     maintainers = with maintainers; [ wkennington ];
     platforms = platforms.x86_64;
+    license = licenses.publicDomain;
   };
 }
diff --git a/pkgs/development/libraries/enchant/default.nix b/pkgs/development/libraries/enchant/default.nix
index c51475ecc2a..a9446306d33 100644
--- a/pkgs/development/libraries/enchant/default.nix
+++ b/pkgs/development/libraries/enchant/default.nix
@@ -13,9 +13,10 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ aspell glib hunspell hspell ];
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Generic spell checking library";
     homepage = http://www.abisource.com/enchant;
-    platforms = stdenv.lib.platforms.unix;
+    platforms = platforms.unix;
+    license = licenses.lgpl21;
   };
 }
diff --git a/pkgs/development/libraries/farstream/default.nix b/pkgs/development/libraries/farstream/default.nix
index 020d0454286..924fb52b090 100644
--- a/pkgs/development/libraries/farstream/default.nix
+++ b/pkgs/development/libraries/farstream/default.nix
@@ -24,10 +24,10 @@ in stdenv.mkDerivation rec {
     gst-plugins-good gst-plugins-bad gst-libav
   ];
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = https://www.freedesktop.org/wiki/Software/Farstream;
     description = "Audio/Video Communications Framework formely known as farsight";
-    maintainers = [ ];
-    platforms = stdenv.lib.platforms.linux;
+    platforms = platforms.linux;
+    license = licenses.lgpl21;
   };
 }
diff --git a/pkgs/development/libraries/giflib/libungif.nix b/pkgs/development/libraries/giflib/libungif.nix
index 357ca751ccf..6336d30aeba 100644
--- a/pkgs/development/libraries/giflib/libungif.nix
+++ b/pkgs/development/libraries/giflib/libungif.nix
@@ -9,7 +9,9 @@ stdenv.mkDerivation {
 
   hardeningDisable = [ "format" ];
 
-  meta = {
-    platforms = stdenv.lib.platforms.unix;
+  meta = with stdenv.lib; {
+    description = "Library and utilities for processing GIFs";
+    platforms = platforms.unix;
+    license = licenses.mit;
   };
 }
diff --git a/pkgs/development/libraries/gobject-introspection/default.nix b/pkgs/development/libraries/gobject-introspection/default.nix
index b2c0a9f89a4..482710f18df 100644
--- a/pkgs/development/libraries/gobject-introspection/default.nix
+++ b/pkgs/development/libraries/gobject-introspection/default.nix
@@ -63,6 +63,7 @@ stdenv.mkDerivation rec {
     homepage    = http://live.gnome.org/GObjectIntrospection;
     maintainers = with maintainers; [ lovek323 lethalman ];
     platforms   = platforms.unix;
+    license = with licenses; [ gpl2 lgpl2 ];
 
     longDescription = ''
       GObject introspection is a middleware layer between C libraries (using