Compose failure on win10

[davemyler]

I'm trying to set this up under docker for windows on a win 10 machine and get an error:

Step 18/24 : COPY build/scripts/install-agent.sh /usr/bin
 ---> f58294c0e994
Step 19/24 : COPY build/scripts/install-node-agent.sh /usr/bin
 ---> c2919eba00f1
Step 20/24 : COPY build/scripts/install-wsagent.sh /usr/bin
 ---> 29e1230abd0b
Step 21/24 : RUN  apk update && apk add --no-cache ${DT_INSTALL_DEPS} ${DT_RUNTIME_DEPS} &&      mkdir -p ${DT_HOME} &&      /usr/bin/install-agent.sh ${AGENT_INSTALLER_URL} &&      /usr/bin/install-wsagent.sh ${WSAGENT_INSTALLER32_URL} &&
      /usr/bin/install-wsagent.sh ${WSAGENT_INSTALLER64_URL} &&      /usr/bin/install-node-agent.sh ${NODE_AGENT_INSTALLER_URL} &&       apk del ${DT_INSTALL_DEPS}
 ---> Running in 1f3892f7c310
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/community/x86_64/APKINDEX.tar.gz
v3.5.2-345-g2a95067e41 [http://dl-cdn.alpinelinux.org/alpine/v3.5/main]
v3.5.2-337-g4634d1b283 [http://dl-cdn.alpinelinux.org/alpine/v3.5/community]
OK: 7963 distinct packages available
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/community/x86_64/APKINDEX.tar.gz
(1/31) Installing ncurses-terminfo-base (6.0_p20171125-r0)
(2/31) Installing ncurses-terminfo (6.0_p20171125-r0)
...
(31/31) Installing openjdk8-jre-base (8.171.11-r0)
Executing busybox-1.25.1-r2.trigger
Executing ca-certificates-20161130-r1.trigger
Executing java-common-0.1-r0.trigger
OK: 81 MiB in 42 packages
/bin/sh: /usr/bin/install-agent.sh: not found
ERROR: Service 'dtagent' failed to build: The command '/bin/sh -c apk update && apk add --no-cache ${DT_INSTALL_DEPS} ${DT_RUNTIME_DEPS} &&      mkdir -p ${DT_HOME} &&      /usr/bin/install-agent.sh ${AGENT_INSTALLER_URL} &&      /usr/bin/install-wsagent.sh ${WSAGENT_INSTALLER32_URL} &&      /usr/bin/install-wsagent.sh ${WSAGENT_INSTALLER64_URL} &&      /usr/bin/install-node-agent.sh ${NODE_AGENT_INSTALLER_URL} &&       apk del ${DT_INSTALL_DEPS}' returned a non-zero code: 127

Given the script it reports as not found has been copied earlier, I'm assuming something later is removing this, but am struggling to find what.