diff --git a/src/rp2040/boot_stage2/CMakeLists.txt b/src/rp2040/boot_stage2/CMakeLists.txt
index 650be0af..ba42256b 100644
--- a/src/rp2040/boot_stage2/CMakeLists.txt
+++ b/src/rp2040/boot_stage2/CMakeLists.txt
@@ -66,15 +66,12 @@ function(pico_define_boot_stage2 NAME SOURCES)
     add_custom_command(OUTPUT ${ORIGINAL_BIN} DEPENDS ${NAME} COMMAND ${CMAKE_OBJCOPY} -Obinary $<TARGET_FILE:${NAME}> ${ORIGINAL_BIN}
         VERBATIM)
 
-    add_custom_target(${NAME}_padded_checksummed_asm DEPENDS ${PADDED_CHECKSUMMED_ASM})
     add_custom_command(OUTPUT ${PADDED_CHECKSUMMED_ASM} DEPENDS ${ORIGINAL_BIN}
             COMMAND ${Python3_EXECUTABLE} ${PICO_BOOT_STAGE2_DIR}/pad_checksum -s 0xffffffff ${ORIGINAL_BIN} ${PADDED_CHECKSUMMED_ASM}
             VERBATIM)
 
-    add_library(${NAME}_library INTERFACE)
-    add_dependencies(${NAME}_library ${NAME}_padded_checksummed_asm)
-    # not strictly (or indeed actually) a link library, but this avoids dependency cycle
-    target_link_libraries(${NAME}_library INTERFACE ${PADDED_CHECKSUMMED_ASM})
+    add_library(${NAME}_library OBJECT ${PADDED_CHECKSUMMED_ASM})
+    target_link_libraries(${NAME}_library INTERFACE "$<TARGET_OBJECTS:${NAME}_library>")
     target_link_libraries(${NAME}_library INTERFACE boot_stage2_headers)
 
     list(GET SOURCES 0 FIRST_SOURCE)
diff --git a/src/rp2350/boot_stage2/CMakeLists.txt b/src/rp2350/boot_stage2/CMakeLists.txt
index 499ed28f..e878ccc5 100644
--- a/src/rp2350/boot_stage2/CMakeLists.txt
+++ b/src/rp2350/boot_stage2/CMakeLists.txt
@@ -66,15 +66,12 @@ function(pico_define_boot_stage2 NAME SOURCES)
     add_custom_command(OUTPUT ${ORIGINAL_BIN} DEPENDS ${NAME} COMMAND ${CMAKE_OBJCOPY} -Obinary $<TARGET_FILE:${NAME}> ${ORIGINAL_BIN}
         VERBATIM)
 
-    add_custom_target(${NAME}_padded_checksummed_asm DEPENDS ${PADDED_CHECKSUMMED_ASM})
     add_custom_command(OUTPUT ${PADDED_CHECKSUMMED_ASM} DEPENDS ${ORIGINAL_BIN}
             COMMAND ${Python3_EXECUTABLE} ${PICO_BOOT_STAGE2_DIR}/pad_checksum -s 0xffffffff -a $<IF:${PICO_RISCV},riscv,arm> ${ORIGINAL_BIN} ${PADDED_CHECKSUMMED_ASM}
             VERBATIM)
 
-    add_library(${NAME}_library INTERFACE)
-    add_dependencies(${NAME}_library ${NAME}_padded_checksummed_asm)
-    # not strictly (or indeed actually) a link library, but this avoids dependency cycle
-    target_link_libraries(${NAME}_library INTERFACE ${PADDED_CHECKSUMMED_ASM})
+    add_library(${NAME}_library OBJECT ${PADDED_CHECKSUMMED_ASM})
+    target_link_libraries(${NAME}_library INTERFACE "$<TARGET_OBJECTS:${NAME}_library>")
     target_link_libraries(${NAME}_library INTERFACE boot_stage2_headers)
 
     list(GET SOURCES 0 FIRST_SOURCE)