--- origsrc/biosig-2.3.3/Makefile	2021-08-13 11:17:24.000000000 +0200
+++ src/biosig-2.3.3/Makefile	2022-01-12 21:54:44.813446500 +0100
@@ -30,13 +30,13 @@ R: lib
 
 install ::
 	$(MAKE) -C biosig4c++ install
-	install -d $(DESTDIR)/usr/local/share/biosig/matlab
-	cp -r biosig4matlab/* $(DESTDIR)/usr/local/share/biosig/matlab/
-	-rm -rf $(DESTDIR)/usr/local/share/biosig/matlab/maybe-missing
+	install -d $(DESTDIR)/usr/share/biosig/matlab
+	cp -r biosig4matlab/* $(DESTDIR)/usr/share/biosig/matlab/
+	-rm -rf $(DESTDIR)/usr/share/biosig/matlab/maybe-missing
 
 uninstall ::
 	$(MAKE) -C biosig4c++ uninstall
-	-rm -rf $(DESTDIR)/usr/local/share/biosig
+	-rm -rf $(DESTDIR)/usr/share/biosig
 
 clean ::
 	$(MAKE) -C biosig4c++/mma clean
@@ -52,8 +52,8 @@ distclean : clean
 		biosig4c++/python/setup.py \
 		biosig4c++/R/DESCRIPTION
 
-ifneq (:,/usr/bin/java)
-ifneq (:,/usr/bin/javac)
+ifneq (:,:)
+ifneq (:,:)
 first :: lib
 	-$(MAKE) -C biosig4c++/java
 endif
@@ -92,11 +92,11 @@ biosig4octave ::
 	ln -sf biosig4c++/mex/biosig4octave-2.3.3.src.tar.gz
 
 ifneq (:,/usr/bin/octave)
-ifneq (:,/usr/bin/mkoctfile)
+ifneq (:,:)
 BIOSIG_MEX_DIR = $(DESTDIR)$(shell octave-config -p LOCALOCTFILEDIR)/biosig
 BIOSIG_DIR     = $(DESTDIR)$(shell octave-config -p LOCALFCNFILEDIR)/biosig
 first ::
-	MKOCTFILE="/usr/bin/mkoctfile" $(MAKE) -C biosig4c++/mex mex4o
+	MKOCTFILE=":" $(MAKE) -C biosig4c++/mex mex4o
 install ::
 	# mexbiosig
 	#-/usr/bin/octave --no-gui --eval "pkg install -global biosig4c++/mex/mexbiosig-2.3.3.src.tar.gz"
@@ -145,7 +145,7 @@ clean ::
 	$(MAKE) -C biosig4c++/python clean
 endif
 
-ifneq (:,/usr/bin/R)
+ifneq (:,:)
 first ::
 	-$(MAKE) -C biosig4c++/R build
 install ::
--- origsrc/biosig-2.3.3/biosig4c++/Makefile	2021-08-13 11:17:24.000000000 +0200
+++ src/biosig-2.3.3/biosig4c++/Makefile	2022-01-12 21:54:45.047825000 +0100
@@ -94,8 +94,8 @@ CFLAGS       += -pipe -fPIC -fno-builtin
 CFLAGS       += -Wno-deprecated
 CFLAGS       += -fvisibility=hidden
 
-prefix        = /usr/local
-exec_prefix  ?= /usr/local
+prefix        = /usr
+exec_prefix  ?= /usr
 libdir        = ${exec_prefix}/lib
 includedir    = ${prefix}/include
 bindir        = ${exec_prefix}/bin
@@ -241,7 +241,7 @@ ifeq (1,1)
 	  LDLIBS     += -lsuitesparseconfig
 	endif
 endif
-ifeq (1,1)
+ifeq (1,)
 	DEFINES      += -D=WITH_DCMTK
 	LDLIBS       += -ldcmdata -loflog -lofstd
 	SOURCES      += t210/sopen_dcmtk_read.cpp
@@ -257,7 +257,7 @@ endif
 ifeq (1,1)
 	LDLIBS     += -lm
 endif
-ifeq (1,1)
+ifeq (1,)
 	DEFINES    += -D=WITH_LIBTINYXML
 	LDLIBS     += -ltinyxml
 endif
@@ -370,7 +370,7 @@ SOURCES      += biosig.c \
 		biosig_client.c \
 		biosig_server.c
 
-ifneq (1,1)
+ifneq (1,)
   ## build with internal TinyXML when libtinyxml is not available
   SOURCES    +=	XMLParser/tinyxml.cpp \
 		XMLParser/tinyxmlparser.cpp \
@@ -790,7 +790,7 @@ win64mma: mma/biosig.tm mma/biosig.c
 #############################################################
 
 mex4o mex4m oct mex:
-	MKOCTFILE="/usr/bin/mkoctfile" $(MAKE) -C mex $@
+	MKOCTFILE=":" $(MAKE) -C mex $@
 
 mexw32 mexw64:
 	CROSS=$(CROSS) CROSS64=$(CROSS64) $(MAKE) -C mex $@
--- origsrc/biosig-2.3.3/biosig4c++/java/Makefile	2021-08-13 11:17:24.000000000 +0200
+++ src/biosig-2.3.3/biosig4c++/java/Makefile	2022-01-12 21:54:45.719726700 +0100
@@ -9,7 +9,7 @@
 ### JNI ###
 # https://stackoverflow.com/questions/5963266/call-c-function-from-java
 
-JAVA_HOME ?= $(realpath $(dir $(realpath $(shell which /usr/bin/javac )))/..)
+JAVA_HOME ?= $(realpath $(dir $(realpath $(shell which : )))/..)
 
 CLASS_PATH ?= $(JAVA_HOME)/bin
 
@@ -21,13 +21,13 @@ libBiosig.so: Biosig.h Biosig.c
 		Biosig.c -L.. -lbiosig -o libBiosig.so
 
 Biosig.h: Biosig.class
-	/usr/bin/javac -h . Biosig.java
+	: -h . Biosig.java
 
 Biosig.class: Biosig.java
-	/usr/bin/javac Biosig.java
+	: Biosig.java
 
 test: libBiosig.so
-	LD_LIBRARY_PATH=.. /usr/bin/java -Djava.library.path=. Biosig "../data/Newtest17-256.bdf"
+	LD_LIBRARY_PATH=.. : -Djava.library.path=. Biosig "../data/Newtest17-256.bdf"
 
 clean: 
 	-rm *.h
--- origsrc/biosig-2.3.3/biosig4c++/mex/Makefile	2021-08-13 11:17:24.000000000 +0200
+++ src/biosig-2.3.3/biosig4c++/mex/Makefile	2022-01-12 21:54:46.157222500 +0100
@@ -116,7 +116,7 @@ else
 	SONAME_POSTFIX = .$(DLEXT).${MAJOR_VERSION}.${MINOR_VERSION}
 endif
 
-exec_prefix ?= /usr/local
+exec_prefix ?= /usr
 
 DEFINES_ALL   = #-D=NDEBUG
 
--- origsrc/biosig-2.3.3/biosig4c++/mma/Makefile	2021-08-13 11:17:24.000000000 +0200
+++ src/biosig-2.3.3/biosig4c++/mma/Makefile	2022-01-12 21:54:46.375982200 +0100
@@ -13,7 +13,7 @@
 CROSS   ?= /home/schloegl/src/mxe.github.schloegl/usr/bin/i686-w64-mingw32.static
 CROSS64 ?= /home/schloegl/src/mxe.github.schloegl/usr/bin/x86_64-w64-mingw32.static
 
-exec_prefix ?= /usr/local
+exec_prefix ?= /usr
 
 ###########################################
 ## set Mathematica variables