2 files changed, 4 insertions, 2 deletions
diff --git a/Makefile.lib b/Makefile.lib
index d776318..80892cb 100644
--- a/Makefile.lib
+++ b/Makefile.lib
@@ -11,4 +11,7 @@ C_FILES   := $(wildcard *.c)
 CPP_FILES := $(wildcard *.cpp)
 OBJS      := $(C_FILES:.c=.o) $(CPP_FILES:.cpp=.o)
 
-all: $(OBJS)
-\ No newline at end of file
+libteensy-core.a: $(OBJS)
+	ar rvs $@ $(OBJS)
+
+all: libteensy-core.a
+\ No newline at end of file
diff --git a/core.nix b/core.nix
index a67e83d..1faaffe 100644
--- a/core.nix
+++ b/core.nix
@@ -34,7 +34,6 @@ pkgs.stdenvNoCC.mkDerivation rec {
     ${copyLibs libs}
 
     make
-    ar rvs libteensy-core.a *.o
 
     popd
   '';