Merge pull request #858 from Warbo/32bit-dev-shell

Add 32bit linux clause to dev-shell

dev-shell

@@ -11,7 +11,7 @@ exec $s release.nix -A tarball --command "
     export NIX_PATH='$NIX_PATH'
     export NIX_BUILD_SHELL=$(type -p bash)
     export c=\$configureFlags
-    exec $s release.nix -A build.$(if [ $(uname -s) = Darwin ]; then echo x86_64-darwin; else echo x86_64-linux; fi) --exclude tarball --command '
+    exec $s release.nix -A build.$(if [ $(uname -s) = Darwin ]; then echo x86_64-darwin; elif [[ $(uname -m) =~ ^i[3456]86$ ]]; then echo i686-linux; else echo x86_64-linux; fi) --exclude tarball --command '
         configureFlags+=\" \$c --prefix=$(pwd)/inst --sysconfdir=$(pwd)/inst/etc\"
         return
     '" \