diff --git a/nixos/modules/services/monitoring/mackerel-agent.nix b/nixos/modules/services/monitoring/mackerel-agent.nix
index 5915634ed26f..d1e84c0359dc 100644
--- a/nixos/modules/services/monitoring/mackerel-agent.nix
+++ b/nixos/modules/services/monitoring/mackerel-agent.nix
@@ -81,7 +81,7 @@ in {
       include = mkDefault "/etc/mackerel-agent/conf.d/*.conf";
     };
 
-    # upstream service file in https://git.io/JUt4Q
+    # upstream service file in https://github.com/mackerelio/mackerel-agent/blob/master/packaging/rpm/src/mackerel-agent.service
     systemd.services.mackerel-agent = {
       description = "mackerel.io agent";
       wants = [ "network-online.target" ];
diff --git a/pkgs/data/themes/adapta-kde/default.nix b/pkgs/data/themes/adapta-kde/default.nix
index a93e78480b00..be9367106d4d 100644
--- a/pkgs/data/themes/adapta-kde/default.nix
+++ b/pkgs/data/themes/adapta-kde/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A port of the Adapta theme for Plasma";
-    homepage = "https://git.io/adapta-kde";
+    homepage = "https://github.com/PapirusDevelopmentTeam/adapta-kde";
     license = lib.licenses.gpl3;
     maintainers = [ lib.maintainers.tadfisher ];
     platforms = lib.platforms.all;
diff --git a/pkgs/data/themes/arc-kde/default.nix b/pkgs/data/themes/arc-kde/default.nix
index 2b41baa63494..79467e1743ef 100644
--- a/pkgs/data/themes/arc-kde/default.nix
+++ b/pkgs/data/themes/arc-kde/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A port of the arc theme for Plasma";
-    homepage = "https://git.io/arc-kde";
+    homepage = "https://github.com/PapirusDevelopmentTeam/arc-kde";
     license = lib.licenses.gpl3;
     maintainers = [ lib.maintainers.nixy ];
     platforms = lib.platforms.all;