diff --git a/pkgs/by-name/da/davix/package.nix b/pkgs/by-name/da/davix/package.nix
index db1ac97a07ac..2e1b357a6c58 100644
--- a/pkgs/by-name/da/davix/package.nix
+++ b/pkgs/by-name/da/davix/package.nix
@@ -12,6 +12,7 @@
   curl,
   gsoap,
   rapidjson,
+  zlib,
   enableTools ? true,
   # Use libcurl instead of libneon
   # Note that the libneon used is bundled in the project
@@ -39,6 +40,7 @@ stdenv.mkDerivation rec {
     libxml2
     openssl
     rapidjson
+    zlib
   ]
   ++ lib.optional (!stdenv.hostPlatform.isDarwin) libuuid
   ++ lib.optional enableThirdPartyCopy gsoap;
@@ -74,6 +76,9 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  # Transitive dependency of gsoap (only supports static library builds)
+  env.NIX_LDFLAGS = "-lz";
+
   meta = {
     description = "Toolkit for Http-based file management";
 
diff --git a/pkgs/by-name/gs/gsoap/package.nix b/pkgs/by-name/gs/gsoap/package.nix
index ff0d0374923a..e534ca3cf575 100644
--- a/pkgs/by-name/gs/gsoap/package.nix
+++ b/pkgs/by-name/gs/gsoap/package.nix
@@ -66,7 +66,10 @@ stdenv.mkDerivation rec {
     # 3. Proprietary commercial software development license (removes GPL
     #    restrictions)
     license = lib.licenses.gpl2;
-    platforms = lib.platforms.linux;
-    maintainers = with lib.maintainers; [ bjornfor ];
+    platforms = lib.platforms.unix;
+    maintainers = with lib.maintainers; [
+      bjornfor
+      veprbl
+    ];
   };
 }
diff --git a/pkgs/by-name/vo/voms/package.nix b/pkgs/by-name/vo/voms/package.nix
index 7746c13ff1b4..d35bc79892a8 100644
--- a/pkgs/by-name/vo/voms/package.nix
+++ b/pkgs/by-name/vo/voms/package.nix
@@ -88,7 +88,10 @@ stdenv.mkDerivation (finalAttrs: {
     homepage = "https://italiangrid.github.io/voms/";
     changelog = "https://github.com/italiangrid/voms/blob/master/ChangeLog";
     license = lib.licenses.asl20;
-    platforms = lib.platforms.linux; # gsoap is currently Linux-only in Nixpkgs
-    maintainers = with lib.maintainers; [ ShamrockLee ];
+    platforms = lib.platforms.unix;
+    maintainers = with lib.maintainers; [
+      ShamrockLee
+      veprbl
+    ];
   };
 })