diff --git a/nixos/modules/services/misc/redmine.nix b/nixos/modules/services/misc/redmine.nix
index 1873d7da4cb9..957571944b28 100644
--- a/nixos/modules/services/misc/redmine.nix
+++ b/nixos/modules/services/misc/redmine.nix
@@ -13,11 +13,12 @@ let
   databaseSettings = {
     production = {
       adapter = cfg.database.type;
-      database = cfg.database.name;
+      database = if cfg.database.type == "sqlite3" then "${cfg.stateDir}/database.sqlite3" else cfg.database.name;
+    } // optionalAttrs (cfg.database.type != "sqlite3") {
       host = if (cfg.database.type == "postgresql" && cfg.database.socket != null) then cfg.database.socket else cfg.database.host;
       port = cfg.database.port;
       username = cfg.database.user;
-    } // optionalAttrs (cfg.database.passwordFile != null) {
+    } // optionalAttrs (cfg.database.type != "sqlite3" && cfg.database.passwordFile != null) {
       password = "#dbpass#";
     } // optionalAttrs (cfg.database.type == "mysql2" && cfg.database.socket != null) {
       socket = cfg.database.socket;
@@ -150,7 +151,7 @@ in
 
       database = {
         type = mkOption {
-          type = types.enum [ "mysql2" "postgresql" ];
+          type = types.enum [ "mysql2" "postgresql" "sqlite3" ];
           example = "postgresql";
           default = "mysql2";
           description = lib.mdDoc "Database engine to use.";
@@ -266,7 +267,7 @@ in
   config = mkIf cfg.enable {
 
     assertions = [
-      { assertion = cfg.database.passwordFile != null || cfg.database.socket != null;
+      { assertion = cfg.database.type != "sqlite3" -> cfg.database.passwordFile != null || cfg.database.socket != null;
         message = "one of services.redmine.database.socket or services.redmine.database.passwordFile must be set";
       }
       { assertion = cfg.database.createLocally -> cfg.database.user == cfg.user;
@@ -275,7 +276,7 @@ in
       { assertion = pgsqlLocal -> cfg.database.user == cfg.database.name;
         message = "services.redmine.database.user and services.redmine.database.name must be the same when using a local postgresql database";
       }
-      { assertion = cfg.database.createLocally -> cfg.database.socket != null;
+      { assertion = cfg.database.createLocally -> cfg.database.type != "sqlite3" && cfg.database.socket != null;
         message = "services.redmine.database.socket must be set if services.redmine.database.createLocally is set to true";
       }
       { assertion = cfg.database.createLocally -> cfg.database.host == "localhost";
@@ -402,7 +403,7 @@ in
         # handle database.passwordFile & permissions
         cp -f ${databaseYml} "${cfg.stateDir}/config/database.yml"
 
-        ${optionalString (cfg.database.passwordFile != null) ''
+        ${optionalString ((cfg.database.type != "sqlite3") && (cfg.database.passwordFile != null)) ''
           DBPASS="$(head -n1 ${cfg.database.passwordFile})"
           sed -e "s,#dbpass#,$DBPASS,g" -i "${cfg.stateDir}/config/database.yml"
         ''}