rav1e: fix .pc file

mingw-w64-rav1e/PKGBUILD

@@ -4,7 +4,7 @@ _realname=rav1e
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=0.5.1
-pkgrel=2
+pkgrel=3
 pkgdesc='An AV1 encoder focused on speed and safety (mingw-w64)'
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64')
@@ -35,10 +35,12 @@ build() {
     --frozen \
     --offline
 
-  cargo capi build \
-    --release \
-    --frozen \
-    --library-type=cdylib
+  MSYS2_ARG_CONV_EXCL="--prefix=" \
+    cargo capi build \
+      --release \
+      --frozen \
+      --library-type=cdylib \
+      --prefix="${MINGW_PREFIX}"
 }
 
 check() {
@@ -59,13 +61,13 @@ package() {
     --path . \
     --root "${pkgdir}${MINGW_PREFIX}"
 
-  MSYS2_ARG_CONV_EXCL="--prefix=;" \
-  cargo capi install \
-    --release \
-    --frozen \
-    --library-type=cdylib \
-    --prefix="${MINGW_PREFIX}" \
-    --destdir="${pkgdir}"
+  MSYS2_ARG_CONV_EXCL="--prefix=" \
+    cargo capi install \
+      --release \
+      --frozen \
+      --library-type=cdylib \
+      --prefix="${MINGW_PREFIX}" \
+      --destdir="${pkgdir}"
 
   # Workaround for import lib
   mv ${pkgdir}${MINGW_PREFIX}/lib/{,lib}rav1e.dll.a