diff --git a/config b/config
index a6c70a0..34b4891 100644
--- a/config
+++ b/config
@@ -42,6 +42,25 @@ else
     fi
 fi
 
+# base wasm features pure is "mvp" , "bi" is bigint
+
+if [ -f /mvp ]
+then
+    export WASM_FLAVOUR=mvp
+    export WASM_EXTRA="-sMIN_SAFARI_VERSION=120000"
+    export WASM_PURE=true
+else
+    export WASM_FLAVOUR=bi
+
+    # extra features. Safari 14 is expected to have BIGINT, ignore the emsdk warnings.
+    export WASM_EXTRA="-sWASM_BIGINT -sMIN_SAFARI_VERSION=140100"
+
+    # tell to not normalize modules.
+    export WASM_PURE=false
+fi
+
+
+
 # ============ emscripten ==============
 
 # stable
@@ -54,6 +73,12 @@ fi
 #export EMFLAVOUR=${EMFLAVOUR:latest}
 export EMFLAVOUR=${EMFLAVOUR:-tot}
 
+#temp fix for oom on CI (Error: Process completed with exit code 143.)
+export EMSDK_NUM_CORES=1
+
+# for shared modules
+export PYDK_PYTHON_HOST_PLATFORM=wasm32-${WASM_FLAVOUR}-emscripten
+
 # ============== wasi sdk ===============
 
 # stable
@@ -76,64 +101,40 @@ NIM_URL=https://github.com/nim-lang/Nim
 NIMSDK=${NIMSDK:-"${SDKROOT}/nimsdk"}
 
 
-# base wasm features pure is "mvp" , "bi" is bigint
 
-if [ -f /mvp ]
-then
-    export WASM_FLAVOUR=mvp
-    export WASM_EXTRA="-sMIN_SAFARI_VERSION=120000"
-    export WASM_PURE=true
-else
-    export WASM_FLAVOUR=bi
 
-    # extra features. Safari 14 is expected to have BIGINT, ignore the emsdk warnings.
-    export WASM_EXTRA="-sWASM_BIGINT -sMIN_SAFARI_VERSION=140100"
 
-    # tell to not normalize modules.
-    export WASM_PURE=false
-fi
+#OLDPATH=${PATH}
 
-#temp fix for oom on CI (Error: Process completed with exit code 143.)
-export EMSDK_NUM_CORES=1
+PATH=/usr/bin:/bin
+for extrabin in /usr/local/bin /opt/bin
+do
+    if echo $PATH|grep -q ":$extrabin"
+    then
+        continue
+    fi
 
-export PYDK_PYTHON_HOST_PLATFORM=wasm32-${WASM_FLAVOUR}-emscripten
+    if [ -d $extrabin ]
+    then
+        PATH=$extrabin:$PATH
+    fi
+done
+
+
+# this is python used for emsdk : ${SYS_PYTHON} -> ${EMSDK_PYTHON}
+for py in 10 9 8 7
+do
+    if command -v python${PYMAJOR}.${py} >/dev/null
+    then
+        export SYS_PYTHON=$(command -v python${PYMAJOR}.${py})
+        break
+    else
+        # sane default
+        export SYS_PYTHON=$(command -v python${PYMAJOR})
+    fi
+done
+
+export GITGET="git clone --recursive --no-tags --depth 1 --single-branch --branch"
+export LD_LIBRARY_PATH="${HOST_PREFIX}/lib:$LD_LIBRARY_PATH"
+export PATH="${HOST_PREFIX}/bin:$PATH"
 
-if echo $LD_LIBRARY_PATH |grep -q ${HOST_PREFIX}/lib
-then
-    # config already set
-    echo -n
-else
-    OLDPATH=${PATH}
-
-    PATH=/usr/bin:/bin
-    for extrabin in /usr/local/bin /opt/bin
-    do
-        if echo $PATH|grep -q ":$extrabin"
-        then
-            continue
-        fi
-
-        if [ -d $extrabin ]
-        then
-            PATH=$extrabin:$PATH
-        fi
-    done
-
-
-    # this is python used for emsdk : ${SYS_PYTHON} -> ${EMSDK_PYTHON}
-    for py in 10 9 8 7
-    do
-        if command -v python${PYMAJOR}.${py} >/dev/null
-        then
-            export SYS_PYTHON=$(command -v python${PYMAJOR}.${py})
-            break
-        else
-            # sane default
-            export SYS_PYTHON=$(command -v python${PYMAJOR})
-        fi
-    done
-
-    export GITGET="git clone --recursive --no-tags --depth 1 --single-branch --branch"
-    export LD_LIBRARY_PATH="${HOST_PREFIX}/lib:$LD_LIBRARY_PATH"
-    export PATH="${HOST_PREFIX}/bin:$PATH:$OLDPATH"
-fi
diff --git a/python-nim-sdk.sh b/python-nim-sdk.sh
index cbba50b..6f8562e 100755
--- a/python-nim-sdk.sh
+++ b/python-nim-sdk.sh
@@ -40,6 +40,7 @@ pushd ${NIMSDK}
             pushd $NIM_VERSION
                 chmod +x *sh
                 CC=clang CXX=clang++ ./build_all.sh
+                rm -rf build csources_v2 nimcache
             popd
         fi
     fi
@@ -62,13 +63,15 @@ echo fmt" ==== Panda3D: generic config {ARCH=} from {SDKROOT=} ===="
 --cc:clang
 --os:linux
 
---define:usemalloc
---noCppExceptions
---define:noCppExceptions
+#--noCppExceptions
+
 --exceptions:quirky
+--define:noCppExceptions
+#--define:usemalloc
+
 
 # gc : bohem => need libgc.so.1
---gc:orc
+--mm:orc
 --define:noSignalHandler
 
 #
@@ -99,7 +102,7 @@ when defined(wasi):
 
 
     switch("passC", fmt"-m32 -Djmp_buf=int")
-    switch("passC", "-Os -g3 -mllvm -inline-threshold=1")
+    switch("passC", "-O0 -g3 -mllvm -inline-threshold=1")
 
     switch("passL","-lstdc++ ")
 
@@ -138,8 +141,6 @@ switch("cincludes", fmt"{SDKROOT}/devices/{ARCH}/usr/include/panda3d")
 
 switch("out", fmt"out.{ARCH}")
 
-
-
 END
 
     cat > nimsdk_env.sh <<END
@@ -151,7 +152,7 @@ then
     . $WASISDK/wasisdk_env.sh
     export XDG_CONFIG_HOME=${NIMSDK}
     export NIMBLE_DIR=${NIMSDK}/pkg
-    export PATH=${NIMSDK}/${NIM_VERSION}/bin:$PATH
+    export PATH=${NIMSDK}/${NIM_VERSION}/bin:\${WASI_SDK_PREFIX}/bin:$PATH
     echo "
 
     * using nimsdk from \$(realpath \${NIMSDK}/\${NIM_VERSION}/bin)
@@ -164,7 +165,7 @@ then
         SDKROOT=$SDKROOT
         NIMSDK=$NIMSDK
         NIMBLE_DIR=\$NIMBLE_DIR
-        PATH=$PATH
+        PATH=\$PATH
 
         clang=\$(which clang)
         clang++=\$(which clang++)
diff --git a/python-wasi-sdk.sh b/python-wasi-sdk.sh
index 538dc01..1b75351 100755
--- a/python-wasi-sdk.sh
+++ b/python-wasi-sdk.sh
@@ -174,14 +174,18 @@ END
 
             CPU=wasm32 TARGET=wasi \
              PYDK_PYTHON_HOST_PLATFORM=wasm32-wasi \
-             PREFIX=/opt/python-wasm-sdk/devices/wasi/usr \
+             PREFIX=/opt/python-wasm-sdk/devices/wasisdk/usr \
              ./scripts/make-shells.sh
 
             cat >> $ROOT/wasm32-wasi-shell.sh <<END
 #!/bin/bash
-. ${SDKROOT}/wasisdk/wasisdk_env.sh
+. ${WASISDK}/wasisdk_env.sh
+
+parse_git_branch() {
+     git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
+}
+    export PS1="[PyDK:wasi]  \[\e[32m\]\w \[\e[91m\]\$(parse_git_branch)\[\e[00m\]\$ "
 
-export PS1="[PyDK:wasisdk] \w $ "
 
 END
 
@@ -202,5 +206,10 @@ END
     fi
 done
 
+
+wget https://github.com/bytecodealliance/wasmtime/releases/download/v17.0.1/wasmtime-v17.0.1-x86_64-linux.tar.xz -O- xzcat | tar xfv -
+mv -vf $(find wasmtime*|grep /wasmtime$) ${WASISDK}/bin/
+
+
 exit 0