diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000000..0b2278f080
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1715534503,
+        "narHash": "sha256-5ZSVkFadZbFP1THataCaSf0JH2cAH3S29hU9rrxTEqk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2057814051972fa1453ddfb0d98badbea9b83c06",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000000..c6e915e9db
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,37 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs =
+    { nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # generic
+            git
+            git-lfs
+            gnumake
+            gnused
+            gnutar
+            gzip
+
+            # frontend
+            nodejs_20
+
+            # linting
+            python312
+            poetry
+
+            # backend
+            go_1_22
+          ];
+        };
+      }
+    );
+}
diff --git a/modules/markup/html.go b/modules/markup/html.go
index 56f63b8a76..4c73b6d796 100644
--- a/modules/markup/html.go
+++ b/modules/markup/html.go
@@ -48,7 +48,7 @@ var (
 	// hashCurrentPattern matches string that represents a commit SHA, e.g. d8a994ef243349f321568f9e36d5c3f444b99cae
 	// Although SHA1 hashes are 40 chars long, SHA256 are 64, the regex matches the hash from 7 to 64 chars in length
 	// so that abbreviated hash links can be used as well. This matches git and GitHub usability.
-	hashCurrentPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([0-9a-f]{7,64})(?:\s|$|\)|\]|[.,](\s|$))`)
+	hashCurrentPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([0-9a-f]{7,64})(?:\s|$|\)|\]|[.,:](\s|$))`)
 
 	// shortLinkPattern matches short but difficult to parse [[name|link|arg=test]] syntax
 	shortLinkPattern = regexp.MustCompile(`\[\[(.*?)\]\](\w*)`)
diff --git a/modules/markup/html_internal_test.go b/modules/markup/html_internal_test.go
index e313be7040..a9fd8c1be6 100644
--- a/modules/markup/html_internal_test.go
+++ b/modules/markup/html_internal_test.go
@@ -381,6 +381,7 @@ func TestRegExp_sha1CurrentPattern(t *testing.T) {
 		"(abcdefabcdefabcdefabcdefabcdefabcdefabcd)",
 		"[abcdefabcdefabcdefabcdefabcdefabcdefabcd]",
 		"abcdefabcdefabcdefabcdefabcdefabcdefabcd.",
+		"abcdefabcdefabcdefabcdefabcdefabcdefabcd:",
 	}
 	falseTestCases := []string{
 		"test",
diff --git a/modules/web/middleware/cookie.go b/modules/web/middleware/cookie.go
index ec6b06f993..f2d25f5b1c 100644
--- a/modules/web/middleware/cookie.go
+++ b/modules/web/middleware/cookie.go
@@ -35,6 +35,10 @@ func GetSiteCookie(req *http.Request, name string) string {
 
 // SetSiteCookie returns given cookie value from request header.
 func SetSiteCookie(resp http.ResponseWriter, name, value string, maxAge int) {
+	// Previous versions would use a cookie path with a trailing /.
+	// These are more specific than cookies without a trailing /, so
+	// we need to delete these if they exist.
+	deleteLegacySiteCookie(resp, name)
 	cookie := &http.Cookie{
 		Name:     name,
 		Value:    url.QueryEscape(value),
@@ -46,10 +50,6 @@ func SetSiteCookie(resp http.ResponseWriter, name, value string, maxAge int) {
 		SameSite: setting.SessionConfig.SameSite,
 	}
 	resp.Header().Add("Set-Cookie", cookie.String())
-	// Previous versions would use a cookie path with a trailing /.
-	// These are more specific than cookies without a trailing /, so
-	// we need to delete these if they exist.
-	deleteLegacySiteCookie(resp, name)
 }
 
 // deleteLegacySiteCookie deletes the cookie with the given name at the cookie