4 files changed, 13 insertions, 9 deletions

diff --git a/src/core/crypto/key_manager.cpp b/src/core/crypto/key_manager.cpp
index fb451a423..a98daed89 100644
--- a/src/core/crypto/key_manager.cpp
+++ b/src/core/crypto/key_manager.cpp
@@ -835,7 +835,7 @@ void KeyManager::SetKey(S128KeyType id, Key128 key, u64 field1, u64 field2) {
             "key_area_key_ocean_{:02X}",
             "key_area_key_system_{:02X}",
         };
-        WriteKeyToFile(category, fmt::format(kak_names.at(field2), field1), key);
+        WriteKeyToFile(category, fmt::format(fmt::runtime(kak_names.at(field2)), field1), key);
     } else if (id == S128KeyType::Master) {
         WriteKeyToFile(category, fmt::format("master_key_{:02X}", field1), key);
     } else if (id == S128KeyType::Package1) {
diff --git a/src/core/file_sys/registered_cache.cpp b/src/core/file_sys/registered_cache.cpp
index 066c6789a..7a646b5f1 100644
--- a/src/core/file_sys/registered_cache.cpp
+++ b/src/core/file_sys/registered_cache.cpp
@@ -58,14 +58,17 @@ static bool FollowsNcaIdFormat(std::string_view name) {
 
 static std::string GetRelativePathFromNcaID(const std::array<u8, 16>& nca_id, bool second_hex_upper,
                                             bool within_two_digit, bool cnmt_suffix) {
-    if (!within_two_digit)
-        return fmt::format(cnmt_suffix ? "{}.cnmt.nca" : "/{}.nca",
-                           Common::HexToString(nca_id, second_hex_upper));
+    if (!within_two_digit) {
+        const auto format_str = fmt::runtime(cnmt_suffix ? "{}.cnmt.nca" : "/{}.nca");
+        return fmt::format(format_str, Common::HexToString(nca_id, second_hex_upper));
+    }
 
     Core::Crypto::SHA256Hash hash{};
     mbedtls_sha256_ret(nca_id.data(), nca_id.size(), hash.data(), 0);
-    return fmt::format(cnmt_suffix ? "/000000{:02X}/{}.cnmt.nca" : "/000000{:02X}/{}.nca", hash[0],
-                       Common::HexToString(nca_id, second_hex_upper));
+
+    const auto format_str =
+        fmt::runtime(cnmt_suffix ? "/000000{:02X}/{}.cnmt.nca" : "/000000{:02X}/{}.nca");
+    return fmt::format(format_str, hash[0], Common::HexToString(nca_id, second_hex_upper));
 }
 
 static std::string GetCNMTName(TitleType type, u64 title_id) {
diff --git a/src/core/frontend/input.h b/src/core/frontend/input.h
index 7a047803e..f1747c5b2 100644
--- a/src/core/frontend/input.h
+++ b/src/core/frontend/input.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <functional>
 #include <memory>
 #include <string>
 #include <tuple>
diff --git a/src/core/hle/service/service.cpp b/src/core/hle/service/service.cpp
index 4e1541630..663b83cd3 100644
--- a/src/core/hle/service/service.cpp
+++ b/src/core/hle/service/service.cpp
@@ -149,10 +149,10 @@ void ServiceFrameworkBase::ReportUnimplementedFunction(Kernel::HLERequestContext
     std::string function_name = info == nullptr ? fmt::format("{}", ctx.GetCommand()) : info->name;
 
     fmt::memory_buffer buf;
-    fmt::format_to(buf, "function '{}': port='{}' cmd_buf={{[0]=0x{:X}", function_name,
-                   service_name, cmd_buf[0]);
+    fmt::format_to(std::back_inserter(buf), "function '{}': port='{}' cmd_buf={{[0]=0x{:X}",
+                   function_name, service_name, cmd_buf[0]);
     for (int i = 1; i <= 8; ++i) {
-        fmt::format_to(buf, ", [{}]=0x{:X}", i, cmd_buf[i]);
+        fmt::format_to(std::back_inserter(buf), ", [{}]=0x{:X}", i, cmd_buf[i]);
     }
     buf.push_back('}');