diff --git a/gucc/include/gucc/string_utils.hpp b/gucc/include/gucc/string_utils.hpp
index 7a68166..d063f66 100644
--- a/gucc/include/gucc/string_utils.hpp
+++ b/gucc/include/gucc/string_utils.hpp
@@ -35,7 +35,7 @@ auto make_multiline(const std::vector<std::string>& multiline, bool reverse = fa
 /// @param lines The lines to join.
 /// @param delim The delimiter to join the lines.
 /// @return The joined lines as a single string.
-auto join(const std::vector<std::string>& lines, std::string_view delim = "\n") noexcept -> std::string;
+auto join(const std::vector<std::string>& lines, char delim = '\n') noexcept -> std::string;
 
 /// @brief Make a split view from a string into multiple lines based on a delimiter.
 /// @param str The string to split.
diff --git a/gucc/src/string_utils.cpp b/gucc/src/string_utils.cpp
index d8b71f2..0f7b339 100644
--- a/gucc/src/string_utils.cpp
+++ b/gucc/src/string_utils.cpp
@@ -35,7 +35,7 @@ auto make_multiline(const std::vector<std::string>& multiline, bool reverse, std
     return res;
 }
 
-auto join(const std::vector<std::string>& lines, std::string_view delim) noexcept -> std::string {
+auto join(const std::vector<std::string>& lines, char delim) noexcept -> std::string {
     return lines | std::ranges::views::join_with(delim) | std::ranges::to<std::string>();
 }
 
diff --git a/gucc/src/user.cpp b/gucc/src/user.cpp
index 762c4d0..c3a525a 100644
--- a/gucc/src/user.cpp
+++ b/gucc/src/user.cpp
@@ -85,7 +85,7 @@ auto create_new_user(const user::UserInfo& user_info, const std::vector<std::str
 
     // Set user groups
     spdlog::info("Setting groups for user {}", user_info.username);
-    const auto& groups_set_cmd = fmt::format(FMT_COMPILE("usermod -aG {} {}"), utils::join(default_groups, ","), user_info.username);
+    const auto& groups_set_cmd = fmt::format(FMT_COMPILE("usermod -aG {} {}"), utils::join(default_groups, ','), user_info.username);
     if (!utils::arch_chroot_checked(groups_set_cmd, mountpoint)) {
         spdlog::error("Failed to set user groups with {}", groups_set_cmd);
         return false;
diff --git a/src/utils.cpp b/src/utils.cpp
index 66b52e2..f7d2f41 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -810,7 +810,7 @@ void install_base(const std::string_view& packages) noexcept {
         spdlog::error("Failed to install base");
         return;
     }
-    const auto& base_pkgs = gucc::utils::join(*pkg_list, " ");
+    const auto& base_pkgs = gucc::utils::join(*pkg_list, ' ');
 
     spdlog::info("Preparing for pkgs to install: '{}'", base_pkgs);
 
@@ -908,7 +908,7 @@ void install_desktop(const std::string_view& desktop) noexcept {
         spdlog::error("Failed to install desktop");
         return;
     }
-    const auto& packages = gucc::utils::join(*pkg_list, " ");
+    const auto& packages = gucc::utils::join(*pkg_list, ' ');
 
     spdlog::info("Preparing for desktop envs to install: '{}'", packages);
     utils::install_from_pkglist(packages);