fix sed

Author: goodmind

travis.sh

@@ -1,3 +1,5 @@
+TAG=$(git describe --tags --long | sed -E -e 's,^[^0-9]*,,;s,([^-]*-g),r\1,;s,[-_],.,g')
+
 clean () {
   rm -rf *.tar.gz;
   rm -rf build;
@@ -14,13 +16,11 @@ compress () {
 build_darwin () {
   raco exe -o build/infornography infornography-macos.rkt;
   export PLATFORM="darwin"
-  export TAG=$(git describe --tags --long | sed -r -e 's,^[^0-9]*,,;s,([^-]*-g),r\1,;s,[-_],.,g')
 }
 
 build_linux () {
   raco exe -o build/infornography infornography.rkt;
   export PLATFORM="linux"
-  export TAG=$(git describe --tags --long | sed -E -e 's,^[^0-9]*,,;s,([^-]*-g),r\1,;s,[-_],.,g')
 }
 
 build () {