Prefer using './' for files in the PWD

.gitignore

@@ -1,2 +1,2 @@
-channels.scm
-guix-installer.iso
+./channels.scm
+./guix-installer.iso

build-iso.sh

@@ -1,9 +1,9 @@
 #!/bin/sh
 
 # Write out the current channels to be included with the image
-guix describe -f channels > channels.scm
+guix describe -f channels > ./channels.scm
 
 # Build the image and copy it to the current directory
-image=$(guix system image -t iso9660 installer.scm)
+image=$(guix system image -t iso9660 ./installer.scm)
 echo "Built image: $image"
 cp $image ./guix-installer.iso