Problem Installing Graphics Magick for use in Custom NodeJS app

I'm trying to get my local Sails app running live on my Webfaction server. I'm using a custom app rather than having selected a node app, because this way I can define the file structure. So far, so good... the app is running and the database works, and all the modules work except for Graphics Magick.

Graphics Magick as a node module ('gm') seems to depend on a separate, deeper installation of Graphics Magick on the system. I'm trying to do this in HOME/src, the same as I (successfully) did to install Node. I downloaded the tar.gz, unzipped it, ran the 'make' command successfully... but when I do 'make install' it says I don't have permission. I don't know what to do about this.

This is the command line output (with personal information replaced):

Makefile:9955: warning: overriding recipe for target `PerlMagick/Magick.pm'
Makefile:4520: warning: ignoring old recipe for target `PerlMagick/Magick.pm'
make  install-am
make[1]: Entering directory `/home/USERNAME/src/GraphicsMagick-1.3.23'
Makefile:9955: warning: overriding recipe for target `PerlMagick/Magick.pm'
Makefile:4520: warning: ignoring old recipe for target `PerlMagick/Magick.pm'
make[2]: Entering directory `/home/USERNAME/src/GraphicsMagick-1.3.23'
Makefile:9955: warning: overriding recipe for target `PerlMagick/Magick.pm'
Makefile:4520: warning: ignoring old recipe for target `PerlMagick/Magick.pm'
 /usr/bin/mkdir -p '/usr/local/lib'
 /bin/sh ./libtool   --mode=install /usr/bin/install -c   magick/libGraphicsMagick.la Magick++/lib/libGraphicsMagick++.la wand/libGraphicsMagickWand.la '/usr/local/lib'
libtool: install: /usr/bin/install -c magick/.libs/libGraphicsMagick.lai /usr/local/lib/libGraphicsMagick.la
/usr/bin/install: cannot create regular file '/usr/local/lib/libGraphicsMagick.la': Permission denied
make[2]: *** [install-libLTLIBRARIES] Error 1
make[2]: Leaving directory `/home/USERNAME/src/GraphicsMagick-1.3.23'
make[1]: *** [install-am] Error 2
make[1]: Leaving directory `/home/USERNAME/src/GraphicsMagick-1.3.23'
make: *** [install] Error 2

So what does it take to get GraphicsMagick fully installed on my system, so that nodejs can use it?