diff --git a/src/secp256k1/CMakeLists.txt b/src/secp256k1/CMakeLists.txt
--- a/src/secp256k1/CMakeLists.txt
+++ b/src/secp256k1/CMakeLists.txt
@@ -144,11 +144,11 @@
 	add_native_executable(gen_context src/gen_context.c)
 
 	add_custom_command(
-		OUTPUT ecmult_static_context.h
+		OUTPUT src/ecmult_static_context.h
 		COMMAND gen_context
 	)
 
-	target_sources(secp256k1 PRIVATE ecmult_static_context.h)
+	target_sources(secp256k1 PRIVATE src/ecmult_static_context.h)
 endif()
 
 # Generate the config