diff --git a/astronaut/astronaut b/astronaut/astronaut
index eb41ea9..c654108 100755
--- a/astronaut/astronaut
+++ b/astronaut/astronaut
@@ -3,17 +3,17 @@
 # Configuration
 
 # Build/install-time directories
-dir_build='/tmp/astronaut/build'  # Temporary directory to build packages
-dir_source='/tmp/astronaut/source'  # Directory where the package sources will be placed
-dir_install='/tmp/astronaut/install'  # Directory where the package will be installed
+dir_build='/var/tmp/astronaut/build'  # Temporary directory to build packages
+dir_source='/var/tmp/astronaut/source'  # Directory where the package sources will be placed
+dir_install='/var/tmp/astronaut/install'  # Directory where the package will be installed
 # The source directory will have subdirs for each different $name,
 #   specified inside the satellite file.
 # The $dir_install variable will have '{pkg}' replaced with $_satname,
 #   which is the filename of the satellite, without the .sat suffix.
 
 # Runtime directories
-dir_sysroot='/'  # The root directory of the system
-dir_prefix='/usr'  # Prefix directory (for /bin, /lib, /share and such)
+dir_sysroot=''  # The root directory of the system
+dir_prefix='/usr'  # Prefix directory (for /bin, /lib, /include, /share and such)
 
 # Default commands
 cmd_download='curl -# -L -o {dst} {src}'  # Command to execute to download files