diff --git a/lib/licenses.nix b/lib/licenses.nix
index b799a6ae8a43..641184af639e 100644
--- a/lib/licenses.nix
+++ b/lib/licenses.nix
@@ -482,6 +482,11 @@ lib.mapAttrs (n: v: v // { shortName = n; }) {
     url = "https://opensource.franz.com/preamble.html";
   };
 
+  llvm-exception = spdx {
+    spdxId = "LLVM-exception";
+    fullName = "LLVM Exception"; # LLVM exceptions to the Apache 2.0 License
+  };
+
   lppl12 = spdx {
     spdxId = "LPPL-1.2";
     fullName = "LaTeX Project Public License v1.2";
diff --git a/pkgs/applications/misc/xpdf/libxpdf.nix b/pkgs/applications/misc/xpdf/libxpdf.nix
index 3b982b1766f9..7b7d9051ada3 100644
--- a/pkgs/applications/misc/xpdf/libxpdf.nix
+++ b/pkgs/applications/misc/xpdf/libxpdf.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation {
     url = "ftp://ftp.foolabs.com/pub/xpdf/xpdf-3.02.tar.gz";
     sha256 = "000zq4ddbwyxiki4vdwpmxbnw5n9hsg9hvwra2p33hslyib7sfmk";
   };
-  
+
   patches = [
     (fetchurl {
       url = "ftp://ftp.foolabs.com/pub/xpdf/xpdf-3.02pl1.patch";
@@ -39,14 +39,15 @@ stdenv.mkDerivation {
     cp -v goo/libGoo.a $out/lib/goo
     cp -v fofi/libfofi.a $out/lib/fofi
     cp -v xpdf/libxpdf.a $out/lib/xpdf
-    
+
     cp -v *.h $out/include
     cp -v goo/*.h $out/include
     cp -v fofi/*.h $out/include
     cp -v xpdf/*.h $out/include
   '';
-    
-  meta = {
-    platforms = stdenv.lib.platforms.unix;
+
+  meta = with stdenv.lib; {
+    platforms = platforms.unix;
+    license = licenses.gpl2;
   };
 }
diff --git a/pkgs/applications/networking/browsers/kristall/default.nix b/pkgs/applications/networking/browsers/kristall/default.nix
index c9b15b6d4fc8..4028f8622c3c 100644
--- a/pkgs/applications/networking/browsers/kristall/default.nix
+++ b/pkgs/applications/networking/browsers/kristall/default.nix
@@ -25,6 +25,7 @@ mkDerivation rec {
         "Graphical small-internet client, supports gemini, http, https, gopher, finger";
       homepage = "https://random-projects.net/projects/kristall.gemini";
       maintainers = with maintainers; [ ehmry ];
+      license = licenses.gpl3;
       inherit (qtmultimedia.meta) platforms;
     };
 }
diff --git a/pkgs/applications/networking/browsers/links2/default.nix b/pkgs/applications/networking/browsers/links2/default.nix
index d58fc8fd19bf..0312c3b6895e 100644
--- a/pkgs/applications/networking/browsers/links2/default.nix
+++ b/pkgs/applications/networking/browsers/links2/default.nix
@@ -34,6 +34,7 @@ stdenv.mkDerivation rec {
     homepage = "http://links.twibright.com/";
     description = "A small browser with some graphics support";
     maintainers = with maintainers; [ raskin ];
+    license = licenses.gpl2Plus;
     platforms = platforms.unix;
   };
 }
diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
index e9ae6696def9..3b0be4dad191 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
@@ -336,5 +336,6 @@ stdenv.mkDerivation rec {
       pierron
     ];
     platforms = platforms.linux;
+    license = licenses.mpl20;
   };
 }
diff --git a/pkgs/applications/science/math/qalculate-gtk/default.nix b/pkgs/applications/science/math/qalculate-gtk/default.nix
index e393111590a8..213530b60a91 100644
--- a/pkgs/applications/science/math/qalculate-gtk/default.nix
+++ b/pkgs/applications/science/math/qalculate-gtk/default.nix
@@ -25,6 +25,7 @@ stdenv.mkDerivation rec {
     description = "The ultimate desktop calculator";
     homepage = "http://qalculate.github.io";
     maintainers = with maintainers; [ gebner ];
+    license = licenses.gpl2Plus;
     platforms = platforms.all;
   };
 }
diff --git a/pkgs/applications/science/misc/root/5.nix b/pkgs/applications/science/misc/root/5.nix
index 58cc8f8f59ef..cab26577bd0b 100644
--- a/pkgs/applications/science/misc/root/5.nix
+++ b/pkgs/applications/science/misc/root/5.nix
@@ -86,5 +86,6 @@ stdenv.mkDerivation rec {
     description = "A data analysis framework";
     platforms = platforms.unix;
     maintainers = with maintainers; [ veprbl ];
+    license = licenses.lgpl21;
   };
 }
diff --git a/pkgs/data/misc/cacert/default.nix b/pkgs/data/misc/cacert/default.nix
index 27aa60ac09f5..f72431c5a27c 100644
--- a/pkgs/data/misc/cacert/default.nix
+++ b/pkgs/data/misc/cacert/default.nix
@@ -65,5 +65,6 @@ stdenv.mkDerivation {
     description = "A bundle of X.509 certificates of public Certificate Authorities (CA)";
     platforms = platforms.all;
     maintainers = with maintainers; [ fpletz ];
+    license = licenses.mpl20;
   };
 }
diff --git a/pkgs/development/libraries/cgui/default.nix b/pkgs/development/libraries/cgui/default.nix
index 39ed74d00750..d6c550a8da87 100644
--- a/pkgs/development/libraries/cgui/default.nix
+++ b/pkgs/development/libraries/cgui/default.nix
@@ -23,5 +23,6 @@ stdenv.mkDerivation rec {
     description = "A multiplatform basic GUI library";
     maintainers = [ maintainers.raskin ];
     platforms = platforms.linux;
+    license = licenses.free;
   };
 }
diff --git a/pkgs/development/libraries/cm256cc/default.nix b/pkgs/development/libraries/cm256cc/default.nix
index aaf409981024..eaddcb86f546 100644
--- a/pkgs/development/libraries/cm256cc/default.nix
+++ b/pkgs/development/libraries/cm256cc/default.nix
@@ -19,5 +19,6 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/f4exb/cm256cc";
     platforms = platforms.linux;
     maintainers = with maintainers; [ alkeryn ];
+    license = licenses.gpl3;
   };
 }
diff --git a/pkgs/development/libraries/dclib/default.nix b/pkgs/development/libraries/dclib/default.nix
index 6b42af05c117..a9929ea2adda 100644
--- a/pkgs/development/libraries/dclib/default.nix
+++ b/pkgs/development/libraries/dclib/default.nix
@@ -10,7 +10,10 @@ stdenv.mkDerivation {
 
   buildInputs = [libxml2 openssl bzip2];
 
-  meta = {
-    platforms = stdenv.lib.platforms.linux;
+  meta = with stdenv.lib; {
+    description = "Peer-to-Peer file sharing client";
+    homepage = "http://dcgui.berlios.de";
+    platforms = platforms.linux;
+    license = [ licenses.openssl licenses.gpl2 ];
   };
 }
diff --git a/pkgs/development/libraries/json-c/default.nix b/pkgs/development/libraries/json-c/default.nix
index a3ddfe4c63c5..c7a9b3c4a125 100644
--- a/pkgs/development/libraries/json-c/default.nix
+++ b/pkgs/development/libraries/json-c/default.nix
@@ -25,6 +25,7 @@ stdenv.mkDerivation rec {
     homepage    = "https://github.com/json-c/json-c/wiki";
     maintainers = with maintainers; [ lovek323 ];
     platforms   = platforms.unix;
+    license = licenses.mit;
 
     longDescription = ''
       JSON-C implements a reference counting object model that allows you to
diff --git a/pkgs/development/libraries/libblocksruntime/default.nix b/pkgs/development/libraries/libblocksruntime/default.nix
index 7863e596e1b8..aff56994f498 100644
--- a/pkgs/development/libraries/libblocksruntime/default.nix
+++ b/pkgs/development/libraries/libblocksruntime/default.nix
@@ -24,4 +24,10 @@ stdenv.mkDerivation {
   doCheck = false; # hasdescriptor.c test fails, hrm.
 
   installPhase = ''prefix="/" DESTDIR=$out ./installlib'';
+
+  meta = with stdenv.lib; {
+    description = "Installs the BlocksRuntime library from the compiler-rt";
+    homepage = "https://github.com/mackyle/blocksruntime";
+    license = licenses.mit;
+  };
 }
diff --git a/pkgs/development/libraries/nuspell/default.nix b/pkgs/development/libraries/nuspell/default.nix
index 57c47c79f843..38f3a1134ee4 100644
--- a/pkgs/development/libraries/nuspell/default.nix
+++ b/pkgs/development/libraries/nuspell/default.nix
@@ -31,5 +31,6 @@ stdenv.mkDerivation rec {
     description = "Free and open source C++ spell checking library";
     homepage = "https://nuspell.github.io/";
     maintainers = with maintainers; [ fpletz ];
+    license = licenses.gpl3;
   };
 }
diff --git a/pkgs/development/libraries/pdf2xml/default.nix b/pkgs/development/libraries/pdf2xml/default.nix
index 08d57cda6c18..855df954eb14 100644
--- a/pkgs/development/libraries/pdf2xml/default.nix
+++ b/pkgs/development/libraries/pdf2xml/default.nix
@@ -32,7 +32,9 @@ stdenv.mkDerivation {
     cp exe/* $out/bin
   '';
 
-  meta = {
-    platforms = stdenv.lib.platforms.unix;
+  meta = with stdenv.lib; {
+    description = "PDF to XML converter";
+    platforms = platforms.unix;
+    license = licenses.gpl2;
   };
 }
diff --git a/pkgs/development/libraries/serialdv/default.nix b/pkgs/development/libraries/serialdv/default.nix
index 178cee5e69ac..d711cd9fc80f 100644
--- a/pkgs/development/libraries/serialdv/default.nix
+++ b/pkgs/development/libraries/serialdv/default.nix
@@ -18,6 +18,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/f4exb/serialdv";
     platforms = platforms.linux;
     maintainers = with maintainers; [ alkeryn ];
+    license = licenses.gpl3;
   };
 }
 
diff --git a/pkgs/development/libraries/wasilibc/default.nix b/pkgs/development/libraries/wasilibc/default.nix
index fb8c0e0fa215..bca025d622af 100644
--- a/pkgs/development/libraries/wasilibc/default.nix
+++ b/pkgs/development/libraries/wasilibc/default.nix
@@ -20,10 +20,11 @@ stdenv.mkDerivation {
     ln -s $out/share/wasm32-wasi/undefined-symbols.txt $out/lib/wasi.imports
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "WASI libc implementation for WebAssembly";
     homepage    = "https://wasi.dev";
-    platforms   = lib.platforms.wasi;
-    maintainers = [ lib.maintainers.matthewbauer ];
+    platforms   = platforms.wasi;
+    maintainers = [ maintainers.matthewbauer ];
+    license = with licenses; [ asl20 mit llvm-exception ];
   };
 }