diff --git a/backend/Makefile b/backend/Makefile
index f62cbd7..d93c067 100644
--- a/backend/Makefile
+++ b/backend/Makefile
@@ -15,10 +15,10 @@ C_FLAGS = \
 	-std=c17 \
 	-Wall -Wextra -Wpedantic -Wconversion \
 	-pedantic -pedantic-errors \
-	-Wno-unused-parameter \
+	-Wno-unused-parameter -Wno-format-zero-length \
 
 L_FLAGS = -lm -pthread $(shell pkg-config sqlite3 openssl --libs)
-C_FLAGS = $(shell pkg-config sqlite3 openssl --cflags)
+C_FLAGS += $(shell pkg-config sqlite3 openssl --cflags)
 
 F_FLAGS =
 OPTIMIZATION =
diff --git a/backend/compile_flags.txt b/backend/compile_flags.txt
index 482caa8..32f238a 100644
--- a/backend/compile_flags.txt
+++ b/backend/compile_flags.txt
@@ -1,4 +1,4 @@
-xc
+-xc
 -std=c17
 -Wall
 -Wextra
diff --git a/backend/src/http_server.c b/backend/src/http_server.c
index 0d254ea..873bcfb 100644
--- a/backend/src/http_server.c
+++ b/backend/src/http_server.c
@@ -183,7 +183,11 @@ void http_ctx_respond(HttpCtx* ctx, int status, const char* body)
 
     string_push_str(&res, body);
 
-    write(ctx->client->file, res.data, res.size);
+    ssize_t bytes_written = write(ctx->client->file, res.data, res.size);
+    if (bytes_written != (ssize_t)res.size) {
+        fprintf(stderr, "error: could not send response\n");
+    }
+
     puts("\nResponse:");
     puts(res.data);
 
diff --git a/backend/src/panic.h b/backend/src/panic.h
index d80ec2f..e6d26e7 100644
--- a/backend/src/panic.h
+++ b/backend/src/panic.h
@@ -7,7 +7,7 @@
     (fputs("\x1b[1;31mpanic\x1b[97m: ", stderr), fprintf(stderr, __VA_ARGS__), \
         fprintf(stderr, "\x1b[0m\n\tin %s:%d\n\tat %s:%d\n", __func__,         \
             __LINE__, __FILE__, __LINE__),                                     \
-        exit(1), 0)
+        exit(1), (void)0)
 
 __attribute__((unused)) static inline void ___include_user(void)
 {