diff --git a/pkgs/applications/networking/instant-messengers/slack/default.nix b/pkgs/applications/networking/instant-messengers/slack/default.nix
index d3321a9ea72e..493f38c585af 100644
--- a/pkgs/applications/networking/instant-messengers/slack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/default.nix
@@ -51,8 +51,8 @@ let
   x86_64-linux-version = "4.23.0";
   x86_64-linux-sha256 = "1wsrxacnj9f3cb6as7ncbdvi02jqcbyc7ijsavps5bls9phkp0is";
 
-  aarch64-darwin-version = "4.22.0";
-  aarch64-darwin-sha256 = "1z2pcgva9ixjx702c1535b4k0xr9fdnfzi5m08xgvabk9x66hqx4";
+  aarch64-darwin-version = "4.23.0";
+  aarch64-darwin-sha256 = "053psiqysyi7l8pviq0vwvk2azlxcpdrwfa0b99f1h6lbfcf48f3";
 
   version = {
     x86_64-darwin = x86_64-darwin-version;
@@ -69,7 +69,7 @@ let
       sha256 = x86_64-darwin-sha256;
     };
     x86_64-linux = fetchurl {
-      url = "${base}/linux_releases/slack-desktop-${version}-amd64.deb";
+      url = "${base}/releases/linux/${version}/prod/x64/slack-desktop-${version}-amd64.deb";
       sha256 = x86_64-linux-sha256;
     };
     aarch64-darwin = fetchurl {
diff --git a/pkgs/applications/networking/instant-messengers/slack/update.sh b/pkgs/applications/networking/instant-messengers/slack/update.sh
index 28591d132d36..688fe579f877 100755
--- a/pkgs/applications/networking/instant-messengers/slack/update.sh
+++ b/pkgs/applications/networking/instant-messengers/slack/update.sh
@@ -18,7 +18,9 @@ nixpkgs_linux_version=$(cat "$slack_nix" | sed -n 's/.*x86_64-linux-version = \"
 nixpkgs_mac_version=$(cat "$slack_nix" | sed -n 's/.*x86_64-darwin-version = \"\([0-9\.]\+\)\";.*/\1/p')
 nixpkgs_mac_arm_version=$(cat "$slack_nix" | sed -n 's/.*aarch64-darwin-version = \"\([0-9\.]\+\)\";.*/\1/p')
 
-if [[ "$nixpkgs_linux_version" == "$latest_linux_version" && "$nixpkgs_mac_version" == "$latest_mac_version" ]]; then
+if [[ "$nixpkgs_linux_version" == "$latest_linux_version" && \
+      "$nixpkgs_mac_version" == "$latest_mac_version" && \
+      "$nixpkgs_mac_arm_version" == "$latest_mac_version" ]]; then
   echo "nixpkgs versions are all up to date!"
   exit 0
 fi
@@ -34,7 +36,7 @@ sed -i "s/x86_64-linux-version = \".*\"/x86_64-linux-version = \"${latest_linux_
 sed -i "s/x86_64-darwin-version = \".*\"/x86_64-darwin-version = \"${latest_mac_version}\"/" "$slack_nix"
 sed -i "s/aarch64-darwin-version = \".*\"/aarch64-darwin-version = \"${latest_mac_version}\"/" "$slack_nix"
 sed -i "s/x86_64-linux-sha256 = \".*\"/x86_64-linux-sha256 = \"${linux_sha256}\"/" "$slack_nix"
-sed -i "s/x86_64-darwin-sha256 = \".*\"/x86_64-darwin-sha256 = \"${mac_arm_sha256}\"/" "$slack_nix"
+sed -i "s/x86_64-darwin-sha256 = \".*\"/x86_64-darwin-sha256 = \"${mac_sha256}\"/" "$slack_nix"
 sed -i "s/aarch64-darwin-sha256 = \".*\"/aarch64-darwin-sha256 = \"${mac_arm_sha256}\"/" "$slack_nix"
 
 if ! nix-build -A slack "$nixpkgs"; then