Use the latest Nim 1.6.6 RC; Handle Nim rebuilds when the new Nimble was already used

.envrc

@@ -1,16 +1,18 @@
 #!/usr/bin/env bash
+
+export IN_STATUS_NIM_WORKSPACE=1
+
 export NIM_REPO="https://github.com/status-im/Nim"
 export NIMBLE_REPO="https://github.com/nim-lang/nimble"
 
 if [[ -z "${NIM_COMMIT}" ]]; then
-  export NIM_COMMIT="727c6378d2464090564dbcd9bc8b9ac648467e38" # v1.6.0
+  export NIM_COMMIT="d38177b11f628d9675809bfa85356c3ee3a26fea" # latest v1.6.x (2021-04-14)
 fi
 
 if [[ -z "${NIMBLE_COMMIT}" ]]; then
-  export NIMBLE_COMMIT="26c9102c84c6b278985cedce79d6b8982361cb81" # latest (2021-12-16)
+  export NIMBLE_COMMIT="d68b2cb6efe8ce298cb5021fe84d3814d755322f" # latest (2021-04-14)
 fi
 
 source ./scripts/rebuild-nim
 
 export PATH="$(pwd)/${NIM_DIR}/bin:$(pwd)/scripts:${PATH}"
-

scripts/rebuild-nim

@@ -114,6 +114,9 @@ build_nim() {
         git clone "${NIMBLE_REPO}" .
         git checkout "${NIMBLE_COMMIT}"
         # we have to delete .git or koch.nim will checkout a branch tip, overriding our target commit
+        # TODO
+        # This is quite the hack and it breaks the output of `nimble --version`
+        # which prints the Nim revision instead of the Nimble revision.
         rm -rf .git
       popd
     fi
@@ -122,6 +125,10 @@ build_nim() {
     rm -rf dist/nimble
     ln -s ../"${NIMBLE_DIR}" dist/nimble
 
+    # Clean up the new Nimble cache, because the csources build
+    # won't recognize the validity of the packages there:
+    rm -rf ~/.nimble/pkgs2
+
     # bootstrap the Nim compiler and build the tools
     rm -f bin/nim bin/nim_csources
     pushd csources