diff --git a/Makefile b/Makefile
index 2214a94..1f71363 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,10 @@
 
-PREFIX = /usr
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
+CXXFLAGS += `pkg-config --cflags lv2`
+
 all: build
 
 build:
@@ -63,7 +66,7 @@ install: all
 	$(MAKE) install -C plugins/mod-caps-Wider.lv2
 
 uninstall:
-	-rm -rf $(DESTDIR)$(PREFIX)/lib/lv2/mod-caps-*.lv2/
+	-rm -rf $(DESTDIR)$(LV2DIR)/mod-caps-*.lv2/
 
 clean:
 	rm -f *.o dsp/*.o
diff --git a/Makefile.single b/Makefile.single
index ab3158e..e2baab1 100644
--- a/Makefile.single
+++ b/Makefile.single
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = __EFFECT__
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-AmpVTS.lv2/Makefile b/plugins/mod-caps-AmpVTS.lv2/Makefile
index 1c2519f..8ec80c3 100644
--- a/plugins/mod-caps-AmpVTS.lv2/Makefile
+++ b/plugins/mod-caps-AmpVTS.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = AmpVTS
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-AutoFilter.lv2/Makefile b/plugins/mod-caps-AutoFilter.lv2/Makefile
index 1cd906f..aae9a83 100644
--- a/plugins/mod-caps-AutoFilter.lv2/Makefile
+++ b/plugins/mod-caps-AutoFilter.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = AutoFilter
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-CEO.lv2/Makefile b/plugins/mod-caps-CEO.lv2/Makefile
index 67f1c47..73f70b3 100644
--- a/plugins/mod-caps-CEO.lv2/Makefile
+++ b/plugins/mod-caps-CEO.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = CEO
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-CabinetIII.lv2/Makefile b/plugins/mod-caps-CabinetIII.lv2/Makefile
index c99307b..51da3c3 100644
--- a/plugins/mod-caps-CabinetIII.lv2/Makefile
+++ b/plugins/mod-caps-CabinetIII.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = CabinetIII
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-CabinetIV.lv2/Makefile b/plugins/mod-caps-CabinetIV.lv2/Makefile
index 71b3a21..09a2494 100644
--- a/plugins/mod-caps-CabinetIV.lv2/Makefile
+++ b/plugins/mod-caps-CabinetIV.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = CabinetIV
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-ChorusI.lv2/Makefile b/plugins/mod-caps-ChorusI.lv2/Makefile
index 7b932c4..a75883c 100644
--- a/plugins/mod-caps-ChorusI.lv2/Makefile
+++ b/plugins/mod-caps-ChorusI.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = ChorusI
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Click.lv2/Makefile b/plugins/mod-caps-Click.lv2/Makefile
index b191e98..723442e 100644
--- a/plugins/mod-caps-Click.lv2/Makefile
+++ b/plugins/mod-caps-Click.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Click
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Compress.lv2/Makefile b/plugins/mod-caps-Compress.lv2/Makefile
index 4d8f695..2de7ca5 100644
--- a/plugins/mod-caps-Compress.lv2/Makefile
+++ b/plugins/mod-caps-Compress.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Compress
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-CompressX2.lv2/Makefile b/plugins/mod-caps-CompressX2.lv2/Makefile
index 9f3884c..90a00d9 100644
--- a/plugins/mod-caps-CompressX2.lv2/Makefile
+++ b/plugins/mod-caps-CompressX2.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = CompressX2
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Eq10.lv2/Makefile b/plugins/mod-caps-Eq10.lv2/Makefile
index c25f0c3..fbe0369 100644
--- a/plugins/mod-caps-Eq10.lv2/Makefile
+++ b/plugins/mod-caps-Eq10.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Eq10
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Eq10X2.lv2/Makefile b/plugins/mod-caps-Eq10X2.lv2/Makefile
index bfeb76b..9ddec12 100644
--- a/plugins/mod-caps-Eq10X2.lv2/Makefile
+++ b/plugins/mod-caps-Eq10X2.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Eq10X2
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Eq4p.lv2/Makefile b/plugins/mod-caps-Eq4p.lv2/Makefile
index 75ecd01..dc19515 100644
--- a/plugins/mod-caps-Eq4p.lv2/Makefile
+++ b/plugins/mod-caps-Eq4p.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Eq4p
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-EqFA4p.lv2/Makefile b/plugins/mod-caps-EqFA4p.lv2/Makefile
index ca8e610..f262091 100644
--- a/plugins/mod-caps-EqFA4p.lv2/Makefile
+++ b/plugins/mod-caps-EqFA4p.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = EqFA4p
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Fractal.lv2/Makefile b/plugins/mod-caps-Fractal.lv2/Makefile
index 071062b..77e50b1 100644
--- a/plugins/mod-caps-Fractal.lv2/Makefile
+++ b/plugins/mod-caps-Fractal.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Fractal
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Narrower.lv2/Makefile b/plugins/mod-caps-Narrower.lv2/Makefile
index 597f729..6065f27 100644
--- a/plugins/mod-caps-Narrower.lv2/Makefile
+++ b/plugins/mod-caps-Narrower.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Narrower
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Noisegate.lv2/Makefile b/plugins/mod-caps-Noisegate.lv2/Makefile
index 13fa4ed..44e8e50 100644
--- a/plugins/mod-caps-Noisegate.lv2/Makefile
+++ b/plugins/mod-caps-Noisegate.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Noisegate
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-PhaserII.lv2/Makefile b/plugins/mod-caps-PhaserII.lv2/Makefile
index 3a02a2c..54eb458 100644
--- a/plugins/mod-caps-PhaserII.lv2/Makefile
+++ b/plugins/mod-caps-PhaserII.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = PhaserII
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Plate.lv2/Makefile b/plugins/mod-caps-Plate.lv2/Makefile
index b52342b..d016e3f 100644
--- a/plugins/mod-caps-Plate.lv2/Makefile
+++ b/plugins/mod-caps-Plate.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Plate
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-PlateX2.lv2/Makefile b/plugins/mod-caps-PlateX2.lv2/Makefile
index 1e45137..fe34bab 100644
--- a/plugins/mod-caps-PlateX2.lv2/Makefile
+++ b/plugins/mod-caps-PlateX2.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = PlateX2
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Saturate.lv2/Makefile b/plugins/mod-caps-Saturate.lv2/Makefile
index 113262a..6280783 100644
--- a/plugins/mod-caps-Saturate.lv2/Makefile
+++ b/plugins/mod-caps-Saturate.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Saturate
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Scape.lv2/Makefile b/plugins/mod-caps-Scape.lv2/Makefile
index f2fd19d..a132800 100644
--- a/plugins/mod-caps-Scape.lv2/Makefile
+++ b/plugins/mod-caps-Scape.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Scape
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Sin.lv2/Makefile b/plugins/mod-caps-Sin.lv2/Makefile
index 21724fa..19a06ea 100644
--- a/plugins/mod-caps-Sin.lv2/Makefile
+++ b/plugins/mod-caps-Sin.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Sin
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Spice.lv2/Makefile b/plugins/mod-caps-Spice.lv2/Makefile
index 2b2bbc4..d4f89af 100644
--- a/plugins/mod-caps-Spice.lv2/Makefile
+++ b/plugins/mod-caps-Spice.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Spice
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-SpiceX2.lv2/Makefile b/plugins/mod-caps-SpiceX2.lv2/Makefile
index a881751..d2e5bf2 100644
--- a/plugins/mod-caps-SpiceX2.lv2/Makefile
+++ b/plugins/mod-caps-SpiceX2.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = SpiceX2
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-ToneStack.lv2/Makefile b/plugins/mod-caps-ToneStack.lv2/Makefile
index 5cd3125..856d2d9 100644
--- a/plugins/mod-caps-ToneStack.lv2/Makefile
+++ b/plugins/mod-caps-ToneStack.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = ToneStack
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-White.lv2/Makefile b/plugins/mod-caps-White.lv2/Makefile
index 8c1ed8f..71f82f4 100644
--- a/plugins/mod-caps-White.lv2/Makefile
+++ b/plugins/mod-caps-White.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = White
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif
diff --git a/plugins/mod-caps-Wider.lv2/Makefile b/plugins/mod-caps-Wider.lv2/Makefile
index a1c7bbf..79f4051 100644
--- a/plugins/mod-caps-Wider.lv2/Makefile
+++ b/plugins/mod-caps-Wider.lv2/Makefile
@@ -1,6 +1,7 @@
 VERSION = 0.9.26
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
+LV2DIR ?= $(PREFIX)/lib/lv2
 DESTDIR =
 
 CXX ?= g++
@@ -30,7 +31,7 @@ OBJECTS = $(SOURCES:.cc=.o)
 PLUG   = Wider
 BUNDLE = mod-caps-$(PLUG).lv2
 ifndef LV2_DEST
-LV2DEST = $(PREFIX)/lib/lv2/$(BUNDLE)
+LV2DEST = $(LV2DIR)/$(BUNDLE)
 else
 LV2DEST = $(LV2_DEST)/$(BUNDLE)
 endif