diff --git a/Makefile b/Makefile
index 653c60a..31ad58d 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,7 @@ SRC_DIR ?= src
 SDK_DIR ?= sdk
 OUT_DIR ?= build
 LIB_DIR ?= lib
+DESTDIR ?=
 
 # Project definition
 include project.mk
@@ -78,8 +79,12 @@ default: library
 .PHONY:  all dirs clean doc install
 
 install: library
-	cp $(OUT_DIR)/lib$(PROJECT_NAME).so $(PREFIX)/$(LIB_DIR)/
-	cp -R include/aisl $(PREFIX)/include/
+	$(info installing files)
+	@mkdir -p $(DESTDIR)$(PREFIX)/$(LIB_DIR)
+	@mkdir -p $(DESTDIR)$(PREFIX)/include
+
+	@cp $(OUT_DIR)/lib$(PROJECT_NAME).so $(DESTDIR)$(PREFIX)/$(LIB_DIR)
+	@cp -R include/aisl $(DESTDIR)$(PREFIX)/include
 
 # vim:ft=make
 #
diff --git a/project.mk b/project.mk
index 46e9e6b..ba4626c 100644
--- a/project.mk
+++ b/project.mk
@@ -51,7 +51,7 @@ PROJECT_LIBRARIES = \
 
 # flags
 PROJECT_CFLAGS  = -D_POSIX_C_SOURCE=200809L
-PROJECT_CFLAGS += -DDEBUG
+#PROJECT_CFLAGS += -DDEBUG
 #PROJECT_CFLAGS += -DAISL_WITHOUT_SSL
 #PROJECT_CFLAGS += -DAISL_WITHOUT_STRINGIFIERS