Fix derivation

Makefile

@@ -1,8 +1,8 @@
-JC ?= jasmin/compiler/jasminc
+JC ?= jasminc
 CC ?= gcc
 MAKE ?= make
 
-.PHONY: clean run $(JC)
+.PHONY: clean run
 
 all: build
 	@true
@@ -16,10 +16,7 @@ build/%.o: build/%.S
 clean:
 	rm build/* 2> /dev/null || true
 
-$(JC):
-	nix-shell jasmin/default.nix --command 'make -C jasmin/compiler CIL -j$(nproc) && make -C jasmin/compiler'
-
-build/%.S: src/%.jazz $(JC)
+build/%.S: src/%.jazz
 	JASMINPATH="Jade=libjade/src/" $(JC) $< -o $@
 
 syscall/jasmin_syscall.o: syscall/jasmin_syscall.c syscall/jasmin_syscall.h