diff --git a/lock.nix b/lock.nix
index dc0e246..74e108a 100644
--- a/lock.nix
+++ b/lock.nix
@@ -4,19 +4,19 @@
     sha256 = "sha256-DlvJv33ml5UTKgu4b0HauOfFIoDx6QXtbqUF3vWeRCY=";
   };
   nixpkgs = {
-    revision = "bf3287dac860542719fe7554e21e686108716879";
-    sha256 = "sha256-kwaaguGkAqTZ1oK0yXeQ3ayYjs8u/W7eEfrFpFfIDFA=";
+    revision = "5b35d248e9206c1f3baf8de6a7683fee126364aa";
+    sha256 = "sha256-NTtKOTLQv6dPfRe00OGSywg37A1FYqldS6xiNmqBUYc=";
   };
   nixpkgs-unstable = {
-    revision = "f02fddb8acef29a8b32f10a335d44828d7825b78";
-    sha256 = "sha256-IgBWhX7A2oJmZFIrpRuMnw5RAufVnfvOgHWgIdds+hc=";
+    revision = "979daf34c8cacebcd917d540070b52a3c2b9b16e";
+    sha256 = "sha256-uKCfuDs7ZM3QpCE/jnfubTg459CnKnJG/LwqEVEdEiw=";
   };
   nix-bitcoin = {
     revision = "990805aa7c7fcd1552c6e14e8c6df9a88ba9be41";
     sha256 = "sha256-yU7iYlDSD8lOrm02igxIl3y+bXGZDDO0qcG0gO48Cto=";
   };
   cosmic-modules = {
-    revision = "9ee103c0e4c46ed36ed51c349d499581801d9d6e";
-    sha256 = "sha256-nFvPap4+GVkcWXMQhuscuZt1t/mnNOKoYZ/a66rr1Xg=";
+    revision = "31f862a4aa17bc24276521e375ac20b531735ee9";
+    sha256 = "sha256-mrIce0ToyjtuhNYSEA+3KB5C2eUNpmK7g1DuqP4L+x0=";
   };
 }
diff --git a/pkgs/by-name/de/den-http-get-updater/package.nix b/pkgs/by-name/de/den-http-get-updater/package.nix
index 106451a..91d8581 100644
--- a/pkgs/by-name/de/den-http-get-updater/package.nix
+++ b/pkgs/by-name/de/den-http-get-updater/package.nix
@@ -5,6 +5,7 @@
   gnused,
   jq,
   nix,
+  uutils-coreutils-noprefix,
   writeScript,
 }:
 
@@ -113,7 +114,7 @@ writeScript "den-http-get-updater" (''
   nixUnpack = lib.optionalString unpack "--unpack";
   nixName = lib.optionalString (!builtins.isNull name) "--name \"${lib.escapeShellArg name}\"";
 in ''
-  for i in {{ 1..30 }}; do
+  for i in {1..30}; do
     nixUrlsResult=$(nix-instantiate --eval --json --strict \
         "${prefetchUrlLocationShellEscape.file}" \
         -A "${prefetchUrlLocationShellEscape.attrpath}"
@@ -125,7 +126,7 @@ in ''
           exit 1
       fi
       echo "prefetchUrlLocation failed (attempt $i)" 1>&2
-      sleep 2
+      ${lib.getExe' uutils-coreutils-noprefix "sleep"} 2
   done