nixpkgs/pkgs/os-specific/linux/zfs/nix-build.patch

diff --git a/Makefile.am b/Makefile.am
index f8abb5f..82e8fb6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,10 +11,10 @@ endif
 if CONFIG_KERNEL
 SUBDIRS += module
 
-extradir = @prefix@/src/zfs-$(VERSION)
+extradir = @prefix@/libexec/zfs-$(VERSION)
 extra_HEADERS = zfs.release.in zfs_config.h.in
 
-kerneldir = @prefix@/src/zfs-$(VERSION)/$(LINUX_VERSION)
+kerneldir = @prefix@/zfs-$(VERSION)/$(LINUX_VERSION)
 nodist_kernel_HEADERS = zfs.release zfs_config.h module/$(LINUX_SYMBOLS)
 endif
 
diff --git a/include/Makefile.am b/include/Makefile.am
index a94cad5..a160fe2 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -29,6 +29,6 @@ libzfs_HEADERS = $(COMMON_H) $(USER_H)
 endif
 
 if CONFIG_KERNEL
-kerneldir = @prefix@/src/zfs-$(VERSION)/include
+kerneldir = @prefix@/include
 kernel_HEADERS = $(COMMON_H) $(KERNEL_H)
 endif
diff --git a/include/linux/Makefile.am b/include/linux/Makefile.am
index 595d1db..d41375d 100644
--- a/include/linux/Makefile.am
+++ b/include/linux/Makefile.am
@@ -18,6 +18,6 @@ libzfs_HEADERS = $(COMMON_H) $(USER_H)
 endif
 
 if CONFIG_KERNEL
-kerneldir = @prefix@/src/zfs-$(VERSION)/include/linux
+kerneldir = @prefix@/include/linux
 kernel_HEADERS = $(COMMON_H) $(KERNEL_H)
 endif
diff --git a/include/sys/Makefile.am b/include/sys/Makefile.am
index 77ecfb2..52b3612 100644
--- a/include/sys/Makefile.am
+++ b/include/sys/Makefile.am
@@ -114,6 +114,6 @@ libzfs_HEADERS = $(COMMON_H) $(USER_H)
 endif
 
 if CONFIG_KERNEL
-kerneldir = @prefix@/src/zfs-$(VERSION)/include/sys
+kerneldir = @prefix@/include/sys
 kernel_HEADERS = $(COMMON_H) $(KERNEL_H)
 endif
diff --git a/include/sys/fm/Makefile.am b/include/sys/fm/Makefile.am
index 8bca5d8..a5eafcd 100644
--- a/include/sys/fm/Makefile.am
+++ b/include/sys/fm/Makefile.am
@@ -16,6 +16,6 @@ libzfs_HEADERS = $(COMMON_H) $(USER_H)
 endif
 
 if CONFIG_KERNEL
-kerneldir = @prefix@/src/zfs-$(VERSION)/include/sys/fm
+kerneldir = @prefix@/include/sys/fm
 kernel_HEADERS = $(COMMON_H) $(KERNEL_H)
 endif
diff --git a/include/sys/fm/fs/Makefile.am b/include/sys/fm/fs/Makefile.am
index fdc9eb5..807c47c 100644
--- a/include/sys/fm/fs/Makefile.am
+++ b/include/sys/fm/fs/Makefile.am
@@ -13,6 +13,6 @@ libzfs_HEADERS = $(COMMON_H) $(USER_H)
 endif
 
 if CONFIG_KERNEL
-kerneldir = @prefix@/src/zfs-$(VERSION)/include/sys/fm/fs
+kerneldir = @prefix@/include/sys/fm/fs
 kernel_HEADERS = $(COMMON_H) $(KERNEL_H)
 endif
diff --git a/include/sys/fs/Makefile.am b/include/sys/fs/Makefile.am
index 0859b9f..b0c6eec 100644
--- a/include/sys/fs/Makefile.am
+++ b/include/sys/fs/Makefile.am
@@ -13,6 +13,6 @@ libzfs_HEADERS = $(COMMON_H) $(USER_H)
 endif
 
 if CONFIG_KERNEL
-kerneldir = @prefix@/src/zfs-$(VERSION)/include/sys/fs
+kerneldir = @prefix@/include/sys/fs
 kernel_HEADERS = $(COMMON_H) $(KERNEL_H)
 endif
diff --git a/module/Makefile.in b/module/Makefile.in
index d4ddee2..876c811 100644
--- a/module/Makefile.in
+++ b/module/Makefile.in
@@ -18,9 +18,9 @@ modules:
 	@# installed devel headers, or they may be in the module
 	@# subdirectory when building against the spl source tree.
 	@if [ -f @SPL_OBJ@/@SPL_SYMBOLS@ ]; then \
-		/bin/cp @SPL_OBJ@/@SPL_SYMBOLS@ .; \
+		cp @SPL_OBJ@/@SPL_SYMBOLS@ .; \
 	elif [ -f @SPL_OBJ@/module/@SPL_SYMBOLS@ ]; then \
-		/bin/cp @SPL_OBJ@/module/@SPL_SYMBOLS@ .; \
+		cp @SPL_OBJ@/module/@SPL_SYMBOLS@ .; \
 	else \
 		echo -e "\n" \
 		"*** Missing spl symbols ensure you have built the spl:\n" \
@@ -28,6 +28,8 @@ modules:
 		"*** - @SPL_OBJ@/module/@SPL_SYMBOLS@\n"; \
 		exit 1; \
 	fi
+	@# when copying a file out of the nix store, we need to make it writable again.
+	chmod +w @SPL_SYMBOLS@
 	$(MAKE) -C @LINUX_OBJ@ SUBDIRS=`pwd` @KERNELMAKE_PARAMS@ CONFIG_ZFS=m $@
 
 clean:
@@ -42,15 +44,15 @@ clean:
 modules_install:
 	@# Install the kernel modules
 	$(MAKE) -C @LINUX_OBJ@ SUBDIRS=`pwd` $@ \
-		INSTALL_MOD_PATH=$(DESTDIR)$(INSTALL_MOD_PATH) \
+		INSTALL_MOD_PATH=@prefix@/$(INSTALL_MOD_PATH) \
 		INSTALL_MOD_DIR=$(INSTALL_MOD_DIR) \
 		KERNELRELEASE=@LINUX_VERSION@
 	@# Remove extraneous build products when packaging
-	kmoddir=$(DESTDIR)$(INSTALL_MOD_PATH)/lib/modules/@LINUX_VERSION@; \
-	if [ -n "$(DESTDIR)" ]; then \
+	kmoddir=@prefix@/$(INSTALL_MOD_PATH)/lib/modules/@LINUX_VERSION@; \
+	if [ -n "@prefix@" ]; then \
 		find $$kmoddir -name 'modules.*' | xargs $(RM); \
 	fi
-	sysmap=$(DESTDIR)$(INSTALL_MOD_PATH)/boot/System.map-@LINUX_VERSION@; \
+	sysmap=@prefix@/$(INSTALL_MOD_PATH)/boot/System.map-@LINUX_VERSION@; \
 	if [ -f $$sysmap ]; then \
 		depmod -ae -F $$sysmap @LINUX_VERSION@; \
 	fi