diff --git a/mingw-w64-ngspice/PKGBUILD b/mingw-w64-ngspice/PKGBUILD
index a015259e0bfbd..4a98658497b40 100644
--- a/mingw-w64-ngspice/PKGBUILD
+++ b/mingw-w64-ngspice/PKGBUILD
@@ -29,6 +29,7 @@ makedepends=(
   "${MINGW_PACKAGE_PREFIX}-autotools"
   "${MINGW_PACKAGE_PREFIX}-cc"
 )
+install="${_realname}-${MSYSTEM}.install"
 source=(
   "https://downloads.sourceforge.net/project/${_realname}/ng-spice-rework/${pkgver}/${_realname}-${pkgver}.tar.gz"
   "https://downloads.sourceforge.net/project/${_realname}/ng-spice-rework/${pkgver}/${_realname}-doc-${pkgver}.tar.gz"
diff --git a/mingw-w64-ngspice/ngspice-CLANG32.install b/mingw-w64-ngspice/ngspice-CLANG32.install
new file mode 100644
index 0000000000000..4a871df2684dc
--- /dev/null
+++ b/mingw-w64-ngspice/ngspice-CLANG32.install
@@ -0,0 +1,9 @@
+post_install() {
+  local _prefix="/clang32"
+  local _prefix_win="$(cygpath -m "${_prefix}")"
+  sed -s "s|${_prefix}|${_prefix_win}|g" -i "${_prefix}/share/ngspice/scripts/spinit"
+}
+
+post_upgrade() {
+  post_install
+}
diff --git a/mingw-w64-ngspice/ngspice-CLANG64.install b/mingw-w64-ngspice/ngspice-CLANG64.install
new file mode 100644
index 0000000000000..6166d167f597e
--- /dev/null
+++ b/mingw-w64-ngspice/ngspice-CLANG64.install
@@ -0,0 +1,9 @@
+post_install() {
+  local _prefix="/clang64"
+  local _prefix_win="$(cygpath -m "${_prefix}")"
+  sed -s "s|${_prefix}|${_prefix_win}|g" -i "${_prefix}/share/ngspice/scripts/spinit"
+}
+
+post_upgrade() {
+  post_install
+}
diff --git a/mingw-w64-ngspice/ngspice-CLANGARM64.install b/mingw-w64-ngspice/ngspice-CLANGARM64.install
new file mode 100644
index 0000000000000..10641137ead61
--- /dev/null
+++ b/mingw-w64-ngspice/ngspice-CLANGARM64.install
@@ -0,0 +1,9 @@
+post_install() {
+  local _prefix="/clangarm64"
+  local _prefix_win="$(cygpath -m "${_prefix}")"
+  sed -s "s|${_prefix}|${_prefix_win}|g" -i "${_prefix}/share/ngspice/scripts/spinit"
+}
+
+post_upgrade() {
+  post_install
+}
diff --git a/mingw-w64-ngspice/ngspice-MINGW32.install b/mingw-w64-ngspice/ngspice-MINGW32.install
new file mode 100644
index 0000000000000..bcce2261e76d3
--- /dev/null
+++ b/mingw-w64-ngspice/ngspice-MINGW32.install
@@ -0,0 +1,9 @@
+post_install() {
+  local _prefix="/mingw32"
+  local _prefix_win="$(cygpath -m "${_prefix}")"
+  sed -s "s|${_prefix}|${_prefix_win}|g" -i "${_prefix}/share/ngspice/scripts/spinit"
+}
+
+post_upgrade() {
+  post_install
+}
diff --git a/mingw-w64-ngspice/ngspice-MINGW64.install b/mingw-w64-ngspice/ngspice-MINGW64.install
new file mode 100644
index 0000000000000..0bdd2e15eb087
--- /dev/null
+++ b/mingw-w64-ngspice/ngspice-MINGW64.install
@@ -0,0 +1,9 @@
+post_install() {
+  local _prefix="/mingw64"
+  local _prefix_win="$(cygpath -m "${_prefix}")"
+  sed -s "s|${_prefix}|${_prefix_win}|g" -i "${_prefix}/share/ngspice/scripts/spinit"
+}
+
+post_upgrade() {
+  post_install
+}
diff --git a/mingw-w64-ngspice/ngspice-UCRT64.install b/mingw-w64-ngspice/ngspice-UCRT64.install
new file mode 100644
index 0000000000000..20b68e40617a9
--- /dev/null
+++ b/mingw-w64-ngspice/ngspice-UCRT64.install
@@ -0,0 +1,9 @@
+post_install() {
+  local _prefix="/ucrt64"
+  local _prefix_win="$(cygpath -m "${_prefix}")"
+  sed -s "s|${_prefix}|${_prefix_win}|g" -i "${_prefix}/share/ngspice/scripts/spinit"
+}
+
+post_upgrade() {
+  post_install
+}