diff --git a/Programs/makefile b/Programs/makefile
index 06b8f14..0f8eed2 100644
--- a/Programs/makefile
+++ b/Programs/makefile
@@ -31,8 +31,8 @@ PROGRAMS = \
 	Examples/Fibonacci/16bitFibonacci.asm \
 	Examples/Fibonacci/32bitFibonacci.asm \
 	Examples/primeSieve/8bitSieve.asm \
-	Examples/primeSieve/16bitSegmentedSieve.asm \
-	Examples/primeSieve/16bitSegmentedSieveModern.asm \
+	Examples/primeSieve/16bitSieve.asm \
+	Examples/primeSieve/16bitSieveModern.asm \
 	Examples/gameOfLife/16x16Life.asm \
 	Examples/gameOfLife/16x16LifeModern.asm \
 	Loader/loader.asm \
@@ -136,6 +136,18 @@ cosmos: $(COSMOS) $(APPS) $(NATIVE_ASM)
 # was still missing - which sends you looking at the change you just made rather than at the
 # stale thing in front of you.
 $(COSMOS_DISK): makefile
+# ---- And on everything it mirrors ----
+#
+# Found the same way as the note above, one layer up. The mirror exists so that adding a file
+# is the whole of putting it on the disk, and that only works if adding a file also REBUILDS
+# the disk - but the prerequisites were as hand-maintained as the list the mirror replaced.
+# tune.asm went into Examples, the image was not remade, and it was simply not there to
+# assemble on the machine. Nothing said so, which is the failure a mirror is for.
+#
+# Found rather than wildcarded, because the tree the mirror walks is a tree and $(wildcard)
+# does not recurse. build is left out for the reason the mirror leaves it out.
+MIRRORED := $(shell find . -name '*.asm' -not -path './build/*' 2>/dev/null)
+$(COSMOS_DISK): $(MIRRORED)
 $(COSMOS_DISK): $(APPS) $(NATIVE_ASM) $(COSMOS) $(STAGE2) testPrograms/stringKeyword.asm \
                 $(wildcard CosmOS/Apps/*.asm) \
                 $(wildcard CosmOS/Source/*.asm) $(wildcard CosmOS/Assembler/*.asm)