diff --git a/windows/deps/Makefile b/windows/deps/Makefile
index d59ad0636..6723ed975 100644
--- a/windows/deps/Makefile
+++ b/windows/deps/Makefile
@@ -52,70 +52,70 @@ sources32/slicot-$(SLICOT_VERSION)-without-underscore: tarballs/slicot-$(SLICOT_
 	rm -rf sources32/slicot-*-without-underscore
 	mkdir -p $@
 	tar xf $< --directory $@ --strip-components=1
-	patch $@/make.inc < patches/slicot-32-without-underscore.patch
+	touch $@
 
 sources32/slicot-$(SLICOT_VERSION)-with-underscore: tarballs/slicot-$(SLICOT_VERSION).tar.gz
 	rm -rf sources32/slicot-*-with-underscore
 	mkdir -p $@
 	tar xf $< --directory $@ --strip-components=1
-	patch $@/make.inc < patches/slicot-32-with-underscore.patch
+	touch $@
 
 sources64/slicot-$(SLICOT_VERSION)-with-32bit-integer: tarballs/slicot-$(SLICOT_VERSION).tar.gz
 	rm -rf sources64/slicot-*-with-32bit-integer
 	mkdir -p $@
 	tar xf $< --directory $@ --strip-components=1
-	patch $@/make.inc < patches/slicot-64-with-32bit-integer.patch
+	touch $@
 
 sources64/slicot-$(SLICOT_VERSION)-with-64bit-integer: tarballs/slicot-$(SLICOT_VERSION).tar.gz
 	rm -rf sources64/slicot-*-with-64bit-integer
 	mkdir -p $@
 	tar xf $< --directory $@ --strip-components=1
-	patch $@/make.inc < patches/slicot-64-with-64bit-integer.patch
+	touch $@
 
 sources64/slicot-$(SLICOT_VERSION)-with-32bit-integer-and-underscore: tarballs/slicot-$(SLICOT_VERSION).tar.gz
 	rm -rf sources64/slicot-*-with-32bit-integer-and-underscore
 	mkdir -p $@
 	tar xf $< --directory $@ --strip-components=1
-	patch $@/make.inc < patches/slicot-64-with-32bit-integer-and-underscore.patch
+	touch $@
 
 sources64/slicot-$(SLICOT_VERSION)-with-64bit-integer-and-underscore: tarballs/slicot-$(SLICOT_VERSION).tar.gz
 	rm -rf sources64/slicot-*-with-64bit-integer-and-underscore
 	mkdir -p $@
 	tar xf $< --directory $@ --strip-components=1
-	patch $@/make.inc < patches/slicot-64-with-64bit-integer-and-underscore.patch
+	touch $@
 
 lib32/Slicot/without-underscore/lib/libslicot_pic.a: sources32/slicot-$(SLICOT_VERSION)-without-underscore
-	make -C $< lib
+	make -C $< lib SLICOTLIB=../libslicot_pic.a OPTS="-O2 -g -fno-underscoring" FORTRAN=i686-w64-mingw32-gfortran LOADER=i686-w64-mingw32-gfortran ARCH=i686-w64-mingw32-ar
 	i686-w64-mingw32-strip --strip-debug $</libslicot_pic.a
 	mkdir -p $(dir $@)
 	cp $</libslicot_pic.a $@
 
 lib32/Slicot/with-underscore/lib/libslicot_pic.a: sources32/slicot-$(SLICOT_VERSION)-with-underscore
-	make -C $< lib
+	make -C $< lib SLICOTLIB=../libslicot_pic.a OPTS="-O2 -g" FORTRAN=i686-w64-mingw32-gfortran LOADER=i686-w64-mingw32-gfortran ARCH=i686-w64-mingw32-ar
 	i686-w64-mingw32-strip --strip-debug $</libslicot_pic.a
 	mkdir -p $(dir $@)
 	cp $</libslicot_pic.a $@
 
 lib64/Slicot/without-underscore/lib/libslicot_pic.a: sources64/slicot-$(SLICOT_VERSION)-with-32bit-integer
-	make -C $< lib
+	make -C $< lib SLICOTLIB=../libslicot_pic.a OPTS="-O2 -g -fno-underscoring" FORTRAN=x86_64-w64-mingw32-gfortran LOADER=x86_64-w64-mingw32-gfortran ARCH=x86_64-w64-mingw32-ar
 	x86_64-w64-mingw32-strip --strip-debug $</libslicot_pic.a
 	mkdir -p $(dir $@)
 	cp $</libslicot_pic.a $@
 
 lib64/Slicot/without-underscore/lib/libslicot64_pic.a: sources64/slicot-$(SLICOT_VERSION)-with-64bit-integer
-	make -C $< lib
+	make -C $< lib SLICOTLIB=../libslicot64_pic.a OPTS="-O2 -g -fno-underscoring -fdefault-integer-8" FORTRAN=x86_64-w64-mingw32-gfortran LOADER=x86_64-w64-mingw32-gfortran ARCH=x86_64-w64-mingw32-ar
 	x86_64-w64-mingw32-strip --strip-debug $</libslicot64_pic.a
 	mkdir -p $(dir $@)
 	cp $</libslicot64_pic.a $@
 
 lib64/Slicot/with-underscore/lib/libslicot_pic.a: sources64/slicot-$(SLICOT_VERSION)-with-32bit-integer-and-underscore
-	make -C $< lib
+	make -C $< lib SLICOTLIB=../libslicot_pic.a OPTS="-O2 -g" FORTRAN=x86_64-w64-mingw32-gfortran LOADER=x86_64-w64-mingw32-gfortran ARCH=x86_64-w64-mingw32-ar
 	x86_64-w64-mingw32-strip --strip-debug $</libslicot_pic.a
 	mkdir -p $(dir $@)
 	cp $</libslicot_pic.a $@
 
 lib64/Slicot/with-underscore/lib/libslicot64_pic.a: sources64/slicot-$(SLICOT_VERSION)-with-64bit-integer-and-underscore
-	make -C $< lib
+	make -C $< lib SLICOTLIB=../libslicot64_pic.a OPTS="-O2 -g -fdefault-integer-8" FORTRAN=x86_64-w64-mingw32-gfortran LOADER=x86_64-w64-mingw32-gfortran ARCH=x86_64-w64-mingw32-ar
 	x86_64-w64-mingw32-strip --strip-debug $</libslicot64_pic.a
 	mkdir -p $(dir $@)
 	cp $</libslicot64_pic.a $@
diff --git a/windows/deps/patches/slicot-32-with-underscore.patch b/windows/deps/patches/slicot-32-with-underscore.patch
deleted file mode 100644
index 827c49fb1..000000000
--- a/windows/deps/patches/slicot-32-with-underscore.patch
+++ /dev/null
@@ -1,30 +0,0 @@
---- make.inc	2012-01-19 20:51:25.000000000 +0100
-+++ slicot-32-with-underscore.inc	2016-09-18 15:39:53.403237169 +0200
-@@ -16,16 +16,16 @@
- #  selected.  Define LOADER and LOADOPTS to refer to the loader and 
- #  desired load options for your machine.
- #
--FORTRAN  = f77
--OPTS     = -O4 -native -u
-+FORTRAN  = i686-w64-mingw32-gfortran
-+OPTS     = -O2 -g
- NOOPT    = -u
--LOADER   = f77
-+LOADER   = i686-w64-mingw32-gfortran
- LOADOPTS = $(SLICOTLIB) $(LPKAUXLIB) $(LAPACKLIB)
- #
- #  The archiver and the flag(s) to use when building archive (library)
- #  If your system has no ranlib, set RANLIB = echo.
- #
--ARCH     = ar
-+ARCH     = i686-w64-mingw32-ar
- ARCHFLAGS= r
- # ARCHFLAGS= cr
- # RANLIB   = ranlib
-@@ -36,5 +36,5 @@
- #
- #BLASLIB     = -L/software/lib
- LAPACKLIB    = -L/software/lib -llapack -lblas
--SLICOTLIB    = ../slicot.a
-+SLICOTLIB    = ../libslicot_pic.a
- LPKAUXLIB    = ../lpkaux.a
diff --git a/windows/deps/patches/slicot-32-without-underscore.patch b/windows/deps/patches/slicot-32-without-underscore.patch
deleted file mode 100644
index 391ba967f..000000000
--- a/windows/deps/patches/slicot-32-without-underscore.patch
+++ /dev/null
@@ -1,30 +0,0 @@
---- make.inc	2012-01-19 20:51:25.000000000 +0100
-+++ slicot-32-without-underscore.inc	2016-09-18 15:32:26.784187836 +0200
-@@ -16,16 +16,16 @@
- #  selected.  Define LOADER and LOADOPTS to refer to the loader and 
- #  desired load options for your machine.
- #
--FORTRAN  = f77
--OPTS     = -O4 -native -u
-+FORTRAN  = i686-w64-mingw32-gfortran
-+OPTS     = -O2 -g -fno-underscoring
- NOOPT    = -u
--LOADER   = f77
-+LOADER   = i686-w64-mingw32-gfortran
- LOADOPTS = $(SLICOTLIB) $(LPKAUXLIB) $(LAPACKLIB)
- #
- #  The archiver and the flag(s) to use when building archive (library)
- #  If your system has no ranlib, set RANLIB = echo.
- #
--ARCH     = ar
-+ARCH     = i686-w64-mingw32-ar
- ARCHFLAGS= r
- # ARCHFLAGS= cr
- # RANLIB   = ranlib
-@@ -36,5 +36,5 @@
- #
- #BLASLIB     = -L/software/lib
- LAPACKLIB    = -L/software/lib -llapack -lblas
--SLICOTLIB    = ../slicot.a
-+SLICOTLIB    = ../libslicot_pic.a
- LPKAUXLIB    = ../lpkaux.a
diff --git a/windows/deps/patches/slicot-64-with-32bit-integer-and-underscore.patch b/windows/deps/patches/slicot-64-with-32bit-integer-and-underscore.patch
deleted file mode 100644
index 2aadf8b9b..000000000
--- a/windows/deps/patches/slicot-64-with-32bit-integer-and-underscore.patch
+++ /dev/null
@@ -1,30 +0,0 @@
---- make.inc	2012-01-19 20:51:25.000000000 +0100
-+++ slicot-64-with-32bit-integer.inc	2016-09-18 15:39:22.022804314 +0200
-@@ -16,16 +16,16 @@
- #  selected.  Define LOADER and LOADOPTS to refer to the loader and 
- #  desired load options for your machine.
- #
--FORTRAN  = f77
--OPTS     = -O4 -native -u
-+FORTRAN  = x86_64-w64-mingw32-gfortran
-+OPTS     = -O2 -g
- NOOPT    = -u
--LOADER   = f77
-+LOADER   = x86_64-w64-mingw32-gfortran
- LOADOPTS = $(SLICOTLIB) $(LPKAUXLIB) $(LAPACKLIB)
- #
- #  The archiver and the flag(s) to use when building archive (library)
- #  If your system has no ranlib, set RANLIB = echo.
- #
--ARCH     = ar
-+ARCH     = x86_64-w64-mingw32-ar
- ARCHFLAGS= r
- # ARCHFLAGS= cr
- # RANLIB   = ranlib
-@@ -36,5 +36,5 @@
- #
- #BLASLIB     = -L/software/lib
- LAPACKLIB    = -L/software/lib -llapack -lblas
--SLICOTLIB    = ../slicot.a
-+SLICOTLIB    = ../libslicot_pic.a
- LPKAUXLIB    = ../lpkaux.a
diff --git a/windows/deps/patches/slicot-64-with-32bit-integer.patch b/windows/deps/patches/slicot-64-with-32bit-integer.patch
deleted file mode 100644
index a069e16ca..000000000
--- a/windows/deps/patches/slicot-64-with-32bit-integer.patch
+++ /dev/null
@@ -1,30 +0,0 @@
---- make.inc	2012-01-19 20:51:25.000000000 +0100
-+++ slicot-64-with-32bit-integer.inc	2016-09-18 15:39:22.022804314 +0200
-@@ -16,16 +16,16 @@
- #  selected.  Define LOADER and LOADOPTS to refer to the loader and 
- #  desired load options for your machine.
- #
--FORTRAN  = f77
--OPTS     = -O4 -native -u
-+FORTRAN  = x86_64-w64-mingw32-gfortran
-+OPTS     = -O2 -g -fno-underscoring
- NOOPT    = -u
--LOADER   = f77
-+LOADER   = x86_64-w64-mingw32-gfortran
- LOADOPTS = $(SLICOTLIB) $(LPKAUXLIB) $(LAPACKLIB)
- #
- #  The archiver and the flag(s) to use when building archive (library)
- #  If your system has no ranlib, set RANLIB = echo.
- #
--ARCH     = ar
-+ARCH     = x86_64-w64-mingw32-ar
- ARCHFLAGS= r
- # ARCHFLAGS= cr
- # RANLIB   = ranlib
-@@ -36,5 +36,5 @@
- #
- #BLASLIB     = -L/software/lib
- LAPACKLIB    = -L/software/lib -llapack -lblas
--SLICOTLIB    = ../slicot.a
-+SLICOTLIB    = ../libslicot_pic.a
- LPKAUXLIB    = ../lpkaux.a
diff --git a/windows/deps/patches/slicot-64-with-64bit-integer-and-underscore.patch b/windows/deps/patches/slicot-64-with-64bit-integer-and-underscore.patch
deleted file mode 100644
index b1c7bc625..000000000
--- a/windows/deps/patches/slicot-64-with-64bit-integer-and-underscore.patch
+++ /dev/null
@@ -1,30 +0,0 @@
---- make.inc	2012-01-19 20:51:25.000000000 +0100
-+++ slicot-64-with-64bit-integer.inc	2016-09-18 15:39:09.142623934 +0200
-@@ -16,16 +16,16 @@
- #  selected.  Define LOADER and LOADOPTS to refer to the loader and 
- #  desired load options for your machine.
- #
--FORTRAN  = f77
--OPTS     = -O4 -native -u
-+FORTRAN  = x86_64-w64-mingw32-gfortran
-+OPTS     = -O2 -g -fdefault-integer-8
- NOOPT    = -u
--LOADER   = f77
-+LOADER   = x86_64-w64-mingw32-gfortran
- LOADOPTS = $(SLICOTLIB) $(LPKAUXLIB) $(LAPACKLIB)
- #
- #  The archiver and the flag(s) to use when building archive (library)
- #  If your system has no ranlib, set RANLIB = echo.
- #
--ARCH     = ar
-+ARCH     = x86_64-w64-mingw32-ar
- ARCHFLAGS= r
- # ARCHFLAGS= cr
- # RANLIB   = ranlib
-@@ -36,5 +36,5 @@
- #
- #BLASLIB     = -L/software/lib
- LAPACKLIB    = -L/software/lib -llapack -lblas
--SLICOTLIB    = ../slicot.a
-+SLICOTLIB    = ../libslicot64_pic.a
- LPKAUXLIB    = ../lpkaux.a
diff --git a/windows/deps/patches/slicot-64-with-64bit-integer.patch b/windows/deps/patches/slicot-64-with-64bit-integer.patch
deleted file mode 100644
index d5597176b..000000000
--- a/windows/deps/patches/slicot-64-with-64bit-integer.patch
+++ /dev/null
@@ -1,30 +0,0 @@
---- make.inc	2012-01-19 20:51:25.000000000 +0100
-+++ slicot-64-with-64bit-integer.inc	2016-09-18 15:39:09.142623934 +0200
-@@ -16,16 +16,16 @@
- #  selected.  Define LOADER and LOADOPTS to refer to the loader and 
- #  desired load options for your machine.
- #
--FORTRAN  = f77
--OPTS     = -O4 -native -u
-+FORTRAN  = x86_64-w64-mingw32-gfortran
-+OPTS     = -O2 -g -fno-underscoring -fdefault-integer-8
- NOOPT    = -u
--LOADER   = f77
-+LOADER   = x86_64-w64-mingw32-gfortran
- LOADOPTS = $(SLICOTLIB) $(LPKAUXLIB) $(LAPACKLIB)
- #
- #  The archiver and the flag(s) to use when building archive (library)
- #  If your system has no ranlib, set RANLIB = echo.
- #
--ARCH     = ar
-+ARCH     = x86_64-w64-mingw32-ar
- ARCHFLAGS= r
- # ARCHFLAGS= cr
- # RANLIB   = ranlib
-@@ -36,5 +36,5 @@
- #
- #BLASLIB     = -L/software/lib
- LAPACKLIB    = -L/software/lib -llapack -lblas
--SLICOTLIB    = ../slicot.a
-+SLICOTLIB    = ../libslicot64_pic.a
- LPKAUXLIB    = ../lpkaux.a